what is the chromosome composition of a normal human male
Answers
Answer: Two of the chromosomes (the X and the Y chromosome) determine your sex as male or female when you are born. They are called sex chromosomes: Females have 2 X chromosomes. Males have 1 X and 1 Y chromosome.Ma
Explanation:
Related Questions
Parent 1 has A blood. Parent 2 has B blood.
Draw a punnett square to show the possibilities of their offspringto have O blood.
Answers
The possibilities of their offspring have O blood is 25%.
What is Punnett Square?Punnett square is defined as the square diagram which is used to predict the genotype of a particular cross or breeding experiment. It is used by biologists to determine the probability of an offspring having a particular genotype.
It is a helpful tool which helps predict the variations and possibilities that may come from cross breeding, which involves predicting how plants, animals, even humans cross with each other.
For above given information,
The Parent 1 and Parent 2 have A and B blood group respectively. So, the possible genotypes when crossed between AO and BO are AB, AO, BO and OO. The possibility of O blood group is 1/4 i.e. 25%.
Thus, the possibilities of their offspring have O blood is 25%.
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explain importance of water potential gradient and osmosis in uptake and loss of water
Answers
Answer:
Mark Brainliest
Explanation:
If the water potential around the plant cell is high, water enters the cell via osmosis. (Movement of water molecules from a region of higher concentration to a region of lower concentration). Hence, the plant cell is turgid (swollen or full of water) now. Having a turgid plant cell is very important as turgidity of a cell prevents the plant from wilting as the cell is firm. Also, a turgid cell pushes the guard cells open (a flaccid cell doesn't as it is limp) and allows gas exchange for photosynthesis and respiration.
Both water potential gradient and osmosis are important for the overall development of plants.
What are the importance of water potential and osmosis in plants?For photosynthesis to occur, plants use water potential to move water to the leaves. The difference between the potential in a specific water sample and pure water is known as the "water potential," which is a measurement of the potential energy in water.
Osmosis aids in preserving the water content of plant cells. It is a technique that enables plants to retain water despite ongoing water loss. It gives the plant body's softer cells a turgidity. Water is absorbed by root hairs from the soil by osmosis. It regulates the movement of water from xylem components to surrounding cells.
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The {{c1::photoreceptors of the eye}} contain a pigment that undergoes a chemical change when struck with a photon
Answers
The photoreceptors in the eye are responsible for detecting light and transmitting visual signals to the brain. These cells contain a pigment that is sensitive to light and undergoes a chemical change when exposed to photons.
The pigment in the photoreceptors is called rhodopsin and it consists of a protein called opsin and a small molecule called retinal. When a photon of light enters the eye and strikes the retinal, it causes the retinal to change shape. This change in shape causes the rhodopsin molecule to become activated, which triggers a series of chemical reactions that ultimately result in the generation of an electrical signal. This electrical signal is then transmitted to the brain via the optic nerve, where it is interpreted as visual information.
Photoreceptors are specialized cells in the retina of the eye that detect and respond to light. There are two types of photoreceptors, rods and cones, which are responsible for different aspects of vision. Rods help with night vision and peripheral vision, while cones are responsible for color vision and sharpness.
The photoreceptors contain a pigment called photopigment, which undergoes a chemical change when struck with a photon (a particle of light). This chemical change triggers a series of events that ultimately convert the light signal into electrical signals that can be processed by the brain. The pigment in rods is called rhodopsin, while there are three types of pigments in cones, each responsible for detecting different wavelengths of light (red, green, and blue). The process of converting light into electrical signals is called phototransduction.
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Which statement describes a deciduous tree?
trees that make cones
trees that drop their leaves year-round
trees that have thin, waxy needles to retain water
trees that drop their leaves in colder seasons in order to conserve water
Answers
What will be the phenotype of the fly that grows from the fertilized cell shown below?
A. Normal wings, black body, antenna, and red eyes.
B. Curly wings, brown body, legs on head, and red eyes.
C. Curly wings, brown body, legs on head, and orange eyes.
D. Normal wings, brown body, legs on head, and red eyes.
Answers
Answer:
D
Explanation:
Normal wings, brown body, legs on head, and red eyes.
what are the major groups of animals and how to they differ
Answers
???????????? Someone help me with this answer please
Answers
9. Which of the following statements is correct?
In flowering plants:
(a) Pollination can take place without fertilisation
(b) Fertilisation can take place without pollination
(c) Pollination and fertilisation are the same
(d) Pollination and fertilisation must occur at the same time
Answers
Answer:
A
Explanation:
The pollen grains can be transferred from anther to stigma(pollination), but fertilization might not take place due to a variety of factors.
Why does ice float on water??
aThe temperature of water and ice are the same
bThe density of ice is less than the density of weter
cThe density of ice is greater than the density of water
dThe temperature of ice is lower than the temperature of water
Answers
Answer:
b. The density of ice is less than the density of water
Explanation:
Anything that is less dense will sink therefore ice sinks into water.
Answer: b. The density of ice is less than the density of water
Explanation:
Cells need energy to perform all of their functions. Where in the cell is the energy made?
Answers
Answer:
mitochondria
Explanation:
3. In the diagram of a cell below, the structure
labeled X enables the cell to
2
(1) release energy
(3) control cell activities
(2) store waste products (4) manufacture proteins
4 If the ribosomes of a cell were destroved whatsoever
Answers
If the ribosomes in the cell were destroyed the cell would not be able to grow (growth and repair)
Answer:
Explanation:
In the diagram you provided, the structure labeled X is the endoplasmic reticulum (ER). The endoplasmic reticulum is a network of flattened sacs and tubes that is found within the cytoplasm of eukaryotic cells (cells that have a nucleus and membrane-bound organelles).
There are two main types of endoplasmic reticulum: the rough endoplasmic reticulum (RER) and the smooth endoplasmic reticulum (SER). The rough endoplasmic reticulum is studded with ribosomes, which are small organelles that synthesize proteins. The smooth endoplasmic reticulum, on the other hand, does not have ribosomes attached to it.
The endoplasmic reticulum plays several important roles in the cell, including:
1. Release of energy: The endoplasmic reticulum is involved in the synthesis of lipids and the breakdown of carbohydrates, which releases energy that can be used by the cell.
2. Control of cell activities: The endoplasmic reticulum helps to regulate the synthesis and transport of proteins and lipids within the cell.
3. Storage of waste products: The smooth endoplasmic reticulum is involved in the synthesis and detoxification of certain substances, such as drugs and hormones.
4. Manufacture of proteins: As mentioned, the rough endoplasmic reticulum is involved in the synthesis of proteins. Proteins are synthesized on the ribosomes attached to the RER and are then transported into the lumen (cavity) of the RER for further processing and modification.
If the ribosomes of a cell were destroyed, the cell would no longer be able to synthesize proteins, which would severely impact its function and survival.
Use the table to describe the major types of bodies of water.
Bodies of water Formation Characteristics
Lakes
Rivers
Wetlands
Cryosphere
Groundwater
Oceans
Answers
Water bodies fall into the following categories: rainwater and aquatic surface, underground water
What do you mean by aquatic?Aquatic does not encompass groundwater because "aquatic" indicates a living environment for both plants and animals. Aquatic means pertaining to water, residing in or near water, or going to take place in water. The term "aquatic" can also apply to an animal that spends the majority or entire its life in water, whether it be a vertebrates or an invertebrate.
What varieties of aquatic are there?Aquatic systems can be divided into three categories: "open," "semi-open," or "closed." An open system involves incoming water running through to the culture facility only once before being discharged from some source (such as fresh water, well steam, or city water). Systems that are open include raceway and cage systems.
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. Wildebeests are large mammals that graze in the African savannah. Females give birth once a year, and young wildebeests are favorite prey for many predators. 95% of young are born during a narrow two-month window of time. Some researchers suggest that this birth synchrony is driven by predation. 1 If that's true, which of the following could explain why most births happen within a small time period? a. The wildebeests create a refuge in time from predation for their young, in that the sheer number born during the two-month window reduces the risk of predation for each individual young wildebeest b. The wildebeests create a metapopulation for their young. so that young in the patches without predators will survive better.
c. The wildebeests increase the self limitation of predators by producing all young during a part of the predator-prey cycle when there are fewer predators. d. The widebeests increase density dependence for their young which causes the stable equilibrium to be higher.
Answers
a. The wildebeests create a refuge in time from predation for their young, in that the sheer number born during the two-month window reduces the risk of predation for each individual young wildebeest.
The explanation given in option a is the most likely scenario. By synchronizing their births within a narrow two-month window, the wildebeests create a refuge in time for their young. The sheer number of births during this period increases the overall density of young wildebeests, which can reduce the risk of predation for each individual. Predators may have difficulty targeting and capturing a large number of young in such a concentrated time frame, increasing the chances of survival for the offspring.
This birth synchrony strategy provides a "safety in numbers" effect, where the presence of many vulnerable young individuals simultaneously can overwhelm predators and improve the survival odds for the wildebeest calves. By clustering births, wildebeests exploit the dilution effect, making it harder for predators to focus on a single target and increasing the overall success of the species in raising the next generation.
Options b, c, and d do not provide as strong an explanation as option a in terms of the observed birth synchrony and its relationship to predation dynamics.
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While each of these processes are believed to have evolved prior to aerobic respiration, which one is the most critical process, without which aerobic respiration could never have developed?
Answers
Answer:
The most critical process, without which aerobic respiration could never have developed, is the process of photosynthesis. Photosynthesis is the biological process by which plants, algae, and some bacteria convert sunlight, carbon dioxide, and water into glucose (a form of energy-rich sugar) and oxygen. This process is responsible for producing the oxygen present in the atmosphere and is the primary source of organic carbon compounds for most life forms on Earth.
Aerobic respiration, on the other hand, is the process by which living organisms use oxygen to convert glucose and other organic molecules into energy, carbon dioxide, and water. It is an essential metabolic process that enables the efficient release of energy from organic compounds.
Photosynthesis provided the evolutionary basis for the development of aerobic respiration. The oxygen generated as a byproduct of photosynthesis in early photosynthetic organisms accumulated in the atmosphere over billions of years, leading to the establishment of an oxygen-rich environment. This increase in atmospheric oxygen levels eventually paved the way for the evolution of aerobic respiration, as organisms could utilize oxygen as an electron acceptor to extract energy from organic molecules more efficiently.
Therefore, while other processes might have evolved prior to aerobic respiration, photosynthesis played a crucial role in creating the conditions necessary for the development of aerobic respiration, making it the most critical process in this context.
After you have written your research question and thesis statement, submit them to your teacher for review and feedback. Then, schedule a meeting with your teacher to discuss your presentation topic. You should be prepared to answer these questions:
What topic are you curious about and why?
How can you learn more about this topic? (investigate/research)
What important questions will you ask to guide your investigation?
What types of resources will you use?
Describe how resources support a position.
Use the space below to write notes and any feedback your teacher gives you during the discussion. If you cannot have a meeting with your teacher, write down your answers to the questions above.
Answers
Answer:
Step 1: Prewriting and Choosing a Topic. Prewriting can help you take a general topic and make it more specific. ...
Step 2: Researching. Researching your subject is an important step in writing because it helps you narrow your focus. ...
Step 3: Outlining. ...
Step 4: Drafting. ...
Step 5: Revising.
Explanation:
Please help!!! Below is a scenario about an experiment; there are three questions referring back to this scenario, so read it carefully. Sherri wanted to test what fertilizer worked best on her tomato plants. She bought 4 different brands of fertilizer, and five tomato plants. She labeled each plant A-E. She did not give plant E any fertilizer. Each plant was kept in the same location, with the same amount of sunlight, and given the same amount of water each day. Each day at noon she measured her plants. 1. What is the independent variable in this scenario? - The type of plant - The growth of the plants - The amount of water given - The fertilizer given 2. What is the dependent variable? - The type of fertilizer - The amount of water given to each plan - The type of plant - Daily plant growth 3. Select all of the controlled variables present. - The type of plant - The type of fertilizer - How much sunlight the plants receive - How much water they receive daily
Answers
Answer:
Independent variable: The fertilizer given
Dependent variable: Daily plant growth
Constants: How much water they receive daily, How much sunlight the plants receive, type of plant (tomato plant)
Explanation:
Independent variable of an experiment is the variable that is changed or manipulated by the experimenter in order to bring about a measurable response. In this experiment where Sherri wanted to test what fertilizer worked best on her tomato plants. She used 4 different brands of fertilizer. Hence, the FERTILIZER is the independent variable
On the other hand, the dependent variable is the variable that is measured in the experiment. It is the variable that responds to the independent variable. In this experiment, the DAILY PLANT GROWTH is the dependent variable.
Constants are variables that are kept unchanged or constant throughout the experiment. In this case, the constants or controlled variables are: : How much water they receive daily, How much sunlight the plants receive, type of plant (tomato plant)
Which of the following statements best describes how science has
developed over time?
A. Each new idea builds on observations and experimentation made
by scientists around the world and throughout history.
B. Each new idea disproves all previous observations and
experiments.
C. Environmental science is new. Our current understanding is based
on observations and experiments performed within the past 20
years.
D. All knowledge of environmental science has been discovered.
Answers
The statement 'Each new idea builds on observations and experimentation made by scientists around the world and throughout history' best describes how science has developed over time (Option A).
What does observation and experimentation mean?The expression 'observation and experimentation' makes reference to all possible answers that are solved by raising scientific questions, which are explained and answered by testing hypotheses and using the scientific method.
In conclusion, the statement 'each new idea builds on observations and experimentation made by scientists around the world and throughout history' best describes how science has developed over time (Option A).
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The pedigree in the figure shows the transmission of a trait in a particular family. Based on this pattern of transmission, the trait is most likely ________.
Answers
The patterns of inheritance best explain the transmission of the trait is Autosomal dominant. Thus the option D is correct.
What is the autosomal dominant?The term refers the genetic characteristics of the disease that lies in the chromosome. The dominant means the single copy of the disease that is linked by mutations and causes the disease.
They include disease like Huntington's disease, neurofibromatosis, and polycystic kidney disease.The pedigree in the figure shows the transmission of a trait in a particular family. Based on this pattern of transmission, the trait is most likely.
Therefore, The patterns of inheritance best explain the transmission of the trait is Autosomal dominant. Thus the option D is correct.
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Question 1 (1 point)
Which of the following explains how density dependent factors can
slow population growth?
There are more births in the population.
There are more deaths in the population.
There are more births and deaths in the population.
There are fewer births and deaths in the population.
Answers
Imagine you are a scientist observing rats in the wild. As the rats reproduce, rats born with white fur slowly begin to outnumber rats with black fur. In three to five sentences, provide two or more different explanations of why the rats with white fur might be outnumbering the rats with black fur
Answers
Complete dominance occurs when a dominant allele hides the expression of the recessive allele in heterozygous individuals. Directional selection favors one of the extreme phenotypes and increases its frequency in the population. Explanations: 1) white fur is dominant over black fur. 2) Directional selection is going on.
What are complete dominance and directional selection?
Complete dominance is the inheritance pattern in which one of the alleles -dominant one- hides the expression of the other allele -recessive one-. This fact becomes evident in heterozygous individuals, who carry both alleles.
The dominant phenotype appears in individuals who carry at least one dominant allele in their genotypes.
Directional selection is one type of natural selection that favors one extreme phenotype in the population, over the others. It increases the frequency of one of the homozygous genotypes and reduces the frequency of the other homozygous genotype and the heterozygous one.
There must be a selective pressure or environmental pressure acting on populations to lead the species to increase the number of individuals expressing that extreme phenotype.
In the exposed example, the frequency of white fur animals increases, while the frequency of black fur animals decreases. Two possible reasons are,
Complete dominance. The white fur phenotype is dominant over the black fur phenotype. In these cases, and only if environmental conditions are proper for both phenotypes, the dominant phenotype will be more frequent than the recessive phenotype. Directional selection might be modeling this population. There might be an environmental factor (a predator, for instance) acting as a selective pressure and leading natural selection to favor one of the extreme phenotypes (in this case, directional selection is favoring the white phenotype over the black phenotye).You can learn more about
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Which body plane passes vertically through the body from head to toe and divides it into equal anterior and posterior halves?
Answers
The body plane that passes vertically through the body from head to toe and divides it into equal anterior and posterior halves is called the median or plane.
This plane runs through the mid line of the body, dividing it into left and right halves. It is also known as the mid plane when it precisely bisects the body into equal halves. The median plane is one of the three primary anatomical planes, along with the frontal (coronal) plane that divides the body into front and back halves,
The transverse (horizontal) plane that divides the body into upper and lower halves. The median plane is crucial in understanding the anatomical structures and relationships within the body.The median plane is one of the three primary anatomical planes, along with the frontal (coronal) plane that divides the body into front and back halves.
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colorless structure behind the iris, sharpens the focus of light rays onto retina. is the meaning of ___
Answers
Answer: Lens
Explanation:
Behind the iris, the lens is made up of transparent proteins called crystallin and supported by ciliary muscles. It bends the light rays passing through it, to fall on retina where receptor cells sense.
5 Cells in a multicellular organism are shown
in the diagram.
Which statement best describes how all
of the cells shown are similar?
B
A They are all making new cells.
They are all transporting oxygen.
They are all doing photosynthesis.
They are all maintaining homeostasis
Answers
The cells in the given diagram are basically involved in the transport of the oxygen.
The correct option is option B.
The cells which are shown in the diagram belong to a multicellular organism and are the red blood cells or the RBCs or erythrocytes. They have a biconcave shape and they carry oxygen to all the tissues and the organs in our body. These red blood cells are able to carry oxygen as they have a special pigment known as the hemoglobin.
The exchange of the gases, which are carbon dioxide as well as the oxygen, takes place in the lungs. The red blood cells also take the carbon dioxide to the lungs so it can be exhaled.
Hence, the correct option is option B.
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What evidence does the cladogram provide
Answers
What is the Purpose of the "DNA extraction liquid"?
Answers
Answer:
plase bear with me i know this is a long answer
Explanation:
The purpose of DNA extraction liquid is to break open cells and dissolve cellular membranes, proteins, and other cellular components in order to release DNA from the cell. This is an essential step in DNA extraction procedures, as DNA is tightly packed within the cell and needs to be isolated and purified for further analysis.
There are many different types of DNA extraction liquids that can be used depending on the type of sample and the downstream application. Commonly used extraction liquids include phenol-chloroform, ethanol, and various commercial kits that utilize a variety of chemical agents and protocols.
The DNA extraction liquid typically contains a combination of reagents that help to disrupt the cell membrane and denature cellular proteins, allowing the DNA to be released and separated from other cellular components. These reagents can include detergents, salts, enzymes, and organic solvents. After the DNA has been released from the cell, it can be further purified using various methods, such as precipitation or column-based purification, depending on the specific application.
In summary, the purpose of DNA extraction liquid is to break open cells and release the DNA for further analysis. It is a critical step in many molecular biology and biotechnology applications, including genetic research, diagnosis of genetic diseases, and forensic analysis.
Hope this helps!!
Which of the classes of intermediate filaments is the most diverse?
a. nuclear lamins in animal cells
b. neurofilaments in nerve cells
c. keratins in epithelia
d. A & C
e. all of the above
Answers
The most diverse class of intermediate filaments is the 'all of the above.
'Intermediate filaments (IF) are a diverse family of fibrous proteins that are abundant in the cytoplasm of vertebrate cells. They form a crucial part of the cytoskeleton of most animal cells. Keratins in epithelia, desmans in muscle, neurofilaments in neurons, and vimentin, nesting, and glial fibrillary acidic protein in diverse cell types are the major classes of intermediate filaments present. IF proteins have also been discovered in the nuclear envelope and the nucleoplasm of cells.
They are characterized by their lack of periodicity in amino acid sequence and their resistance to depolymerization by a variety of chemical reagents. Because of their structural diversity and robustness, intermediate filaments are thought to play a variety of roles in cells, including mechanical reinforcement and protection of cells from various forms of stress. The cytoskeleton, in general, has been shown to be vital to cell mechanics, motility, division, and growth. Therefore, IFs are an important component of the cytoskeleton that allow for cellular integrity.
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White-tailed deer are mammals. Mammals have a reproductive strategy
that is not found in all animals.
Which two statements provide a cause and effect of the reproductive
strategy of white-tailed deer that helps them survive?
A. It requires two parents.
B. It requires only one parent.
C. It causes very fast growth and development.
D. It produces genetic variation within a population.
E. It results in individuals being identical to one parent.
Answers
Which of the following statement is correct regarding pH Scale?; (i) It is the negative logarithm of H+ ion concentration of a given solution.; (ii) It is the positive logarithm of H+ ion concentration of a given solution.; (iii) It is a 14 point scale.; (iv) pH is an example of an extrinsic property.; Correct Options are:
A) (i) and (iii)
B) (ii) and (iii)
C) (i), (iii) and (iv)
D) Only (ii)
Answers
The correct statement regarding the pH scale is it is the negative logarithm of the H⁺ ion concentration of a given solution (option i) and it is a 14-point scale (option iii). Thus, the correct option is A.
The pH scale is a 14-point scale that measures the acidity or alkalinity of a solution. It is defined as the negative logarithm of the concentration of hydrogen ions (H⁺) in the solution. A lower pH value indicates a higher concentration of hydrogen ions and a more acidic solution, while a higher pH value indicates a lower concentration of hydrogen ions and a more alkaline solution. pH is an intrinsic property, not an extrinsic property.
Thus, the correct option is A.
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Question 2 (2 points)
Nitrogen is important for creating __
nucleic acids such as ___
Answers
Answer:
Nitrogen is essential for all living things because it is a major part of amino acids, which are the building blocks of proteins and of nucleic acids such as DNA, which transfers genetic information to subsequent generations of organisms. hopes this helps let me know :)
Based on this information, what is her weight on Earth? How would her
mass be affected by the different gravities on each of the planetary bodies? Explain
how gravity affects mass.
Answers
Gravity does not affect the mass of an object, but it does affect the weight of an object on different planetary bodies.
The weight of an object is directly proportional to its mass and the strength of the gravitational field on that planet.
How would mass be affected by the different gravities of each of the planetary bodies?Gravity does not affect the mass of an object.
Mass is a measure of the amount of matter in an object and is a fundamental property of that object. It remains constant regardless of the gravitational force acting upon it.
However, weight, which is the force with which gravity pulls on an object, is affected by the gravitational field of a planetary body. The weight of an object on a planet or other celestial body depends on the mass of that object and the strength of the gravitational field on that planet.
The formula for calculating weight is:
Weight = mass x gravitational acceleration
where gravitational acceleration is the acceleration due to gravity on that planet.
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