Answers
Answer:
Explanation:
P . P
p | Pp . Pp
p | Pp . Pp
Related Questions
Which organisms should be classified in more than one trophic level?
Answers
Birds are also organisms that belong to more than one trophies level. When birds eat seeds they become the primary consumer, but when they eat insects they become the secondary or even the tertiary consumers.
Olfactory receptor cells are essential for our sense of.
Answers
Answer:
Smell. They make us smell things.
Explanation:
Which of the following is a modification of the simple columnar epithelium that allows for efficient absorption along portions of the digestive tract? fibroblasts thin and permeable dense microville cilia
Answers
The correct answer is "microvilli." Microvilli are microscopic, finger-like projections that extend from the apical surface of cells in a simple columnar epithelium. These small structures greatly increase the surface area available for absorption and play a crucial role in enhancing the efficiency of nutrient absorption along portions of the digestive tract.
Within the digestive tract, the simple columnar epithelium lines the surface of organs like the small intestine and large intestine, where nutrient absorption occurs. The presence of microvilli on the surface of these epithelial cells provides numerous benefits for efficient absorption.
Firstly, the abundance of microvilli significantly increases the total surface area available for absorption. This increased surface area allows for a greater contact between the luminal contents (such as digested food) and the absorptive cells, maximizing the absorption of nutrients like carbohydrates, proteins, and fats.
Secondly, the microvilli contain specialized transport proteins and channels that facilitate the absorption of specific molecules. These proteins help transport nutrients across the epithelial cells and into the bloodstream or lymphatic system. The dense packing of microvilli amplifies the presence of these transport proteins, further enhancing absorption efficiency.
Additionally, the microvilli possess a brush-like appearance due to their close arrangement. This brush border aids in trapping and retaining the digested food particles and nutrients, preventing their rapid movement through the digestive tract. This allows for sufficient time for absorption processes to occur.
In contrast to microvilli, cilia are hair-like structures present on certain types of epithelial cells. While cilia have important functions like moving mucus and facilitating the movement of substances, they are not directly involved in absorption along portions of the digestive tract.
Therefore, the modification of the simple columnar epithelium that enables efficient absorption along portions of the digestive tract is the presence of microvilli.
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land environments are different than water environments
true
false
Answers
Answer:
true
Explanation:
because land environment is different from water environment .
Hope it help you
Answer:
True
Explanation:
some birth control pills are forms of synthetic progesterone. progesterone prevents ovulation and follicular development. it works via negative feedback by decreasing the release of gonadotropin-releasing hormone (gnrh) from the hypothalamus. which hormones are affected by this type of birth control pill, and how are they affected? why does this prevent ovulation and follicular development?
Answers
Synthetic progesterone in birth control pills provides a reliable method of contraception by suppressing ovulation and inhibiting the development of follicles, thereby preventing fertilization and pregnancy.
Birth control pills containing synthetic progesterone, also known as progestins, primarily affect the hormones involved in the menstrual cycle, namely follicle-stimulating hormone (FSH) and luteinizing hormone (LH). These hormones are released by the pituitary gland and play a crucial role in the maturation and release of eggs from the ovaries.
Synthetic progesterone works by inhibiting the secretion of gonadotropin-releasing hormone (GnRH) from the hypothalamus, which, in turn, reduces the release of FSH and LH from the pituitary gland. This negative feedback loop results in the suppression of ovulation and the development of follicles in the ovaries.
Without sufficient levels of FSH and LH, the follicles in the ovaries cannot develop fully, preventing ovulation. Additionally, synthetic progesterone thickens the cervical mucus, making it more difficult for sperm to reach the egg even if ovulation were to occur.
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you are looking for a well-camouflaged animal in an exhibit at the zoo. finding it will require a. an attentive process. b. an affective reaction. c. a preattentive process. d. spreading activation.
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You're seeking for a cleverly disguised animal in a zoo exhibit. It will require an attentive process (option A)
An attentive procedure is one that necessitates careful monitoring and looking for a specific item in a series.
Pigments and morphological features are the two main ways that animal species conceal themselves. Biochromes are small, naturally occurring pigments found in some organisms that reflect some wavelengths of light and absorb others. Biochrome-containing species genuinely seem to change their color.
When an animal is disguised, its coloration is planned to make it resemble another non-food object in its surroundings. For instance, when seated stationary, walking sticks appear to be sticks.
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in a certain african population, 4 % of the population is born with sickle cell anemia (aa). calculate the percentage of individuals who enjoy the selective advantage of the sickle- cell gene?
Answers
Percentage of heterozygote who have selected advantage of sickle cell gene is 32%.
What occurs to someone who has sickle cell anemia?Sickle cells that obstruct organ blood flow deprive those organs of oxygen and blood. Blood oxygen levels in sickle cell anemia are also consistently low. The kidneys, liver, spleen, and other organs can all suffer damage from this lack of oxygen-rich blood, which can be fatal.
Percentage of people who have sickle cell disease(aa) = 4%
aa's frequency = p² = 4/100 = 0.04
Frequency of a particular allele = q = √0.04 = 0.2
A allele's allele frequency = p = 1-q = 1-0.2 = 0.8
Due to the short half-life of sickle-shaped RBCs, malarial parasites do not finish their reproductive life cycle, giving heterozygotes Aa a selective advantage (increased malaria resistance).
Heterozygotes with the genotype Aa in the population
2pq = 2×0.8×0.2 = 0.32
Population heterozygotes as a percentage = 0.32×100 = 32%.
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What part of the digestive system absorbs nutrients that our bodies need?
A. Mouth
B. small intestine
C. stomach
D. large intestine
Answers
Answer:
small intestine
.
is the correct answer
Answer:
B. small intestine
Explanation:
Small intestine absorbs the nutrients that our bodies need.
The ecosystem we call the human body is also affected by abiotic components. List at least three abiotic components that could be in a human body ecosystem.
Answers
Answer:
The factors are:
Temperature
Light
Water
Explanation:
these abiotic factors work together to create a unique ecosystem
Please help me I desperately need it
Answers
Answer:
D) Water temperature decreases; copper temperature increases
Explanation:
The temperature is a way of describing how much heat something has. Because the temperatures of the two substances are not the same, the heat is going to want to travel to the substance with less heat. Therefore, since the copper has less heat than the water, the heat will be transferred to the copper. Remember that this heat is now leaving the water. This increases the temperature of the copper and decreases the temperature of the water.
Bronchi branch into _________________ These tubes end in bunches of
______________________________.
Answers
Bronchi branch into bronchioles, which branch into alveoli.
What are bronchi?
Your bronchi are the broad tubes that join to your trachea (windpipe) and send air to your left and right lungs, respectively. Your chest contains them. The word "bronchus" is pluralized as "bronchi." Your left lung receives air through your left bronchus. Your right lung receives air through your right bronchus. A crucial component of your respiratory system is your bronchi. Your bronchi distribute the air inside your lung as you breathe and your lungs expand.
Hence, Alveoli are created when bronchi branch into bronchioles.
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What does CGG represent?
Answers
Answer:
Shorthand for the DNA sequence: cytosine-guanine-guanine. Cytosine and guanine are two of the four molecules, otherwise called nucleic acids, that make up DNA.
Explanation:
<3
A valley or depression between continents:
A. Ocean basin
B. Divergent boundary
C.Transform boundary
D. Convergent boundary
Answers
Answer:
D
Explanation:
A large underwater region that makes up roughly three-quarters of the Earth's surface is called an ocean basin, between two continents, a valley or depression is called an ocean basin, hence option A is correct.
What is the ocean basin?They are over 4 km deep on average and collectively hold the vast bulk of the world's freshwater (about 2.5 miles).
Rifts are originally created by divergent borders inside continents, and they gradually develop into rift valleys. The majority of active divergent plate borders are found as mid-oceanic ridges between oceanic plates.
The most significant tectonic processes that mold ocean basins are subduction and seafloor spreading. Along the edges of tectonic plates that are separating from one another, the seafloor spreads. Mid-ocean ridges are the term for these regions.
Therefore, between two continents, a valley or depression is called an ocean basin, hence option A is correct.
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If all your organs are components in the human body system, what body part act as the boundary?
Answers
Would the following be classified as a carbohydrate, lipid, protein, or nucleic acid?
Carbohydrate
Lipid
Protein
Nucleic Acid
Answers
Answer:
nucleic acid and it must not be the others
heteroplasmy occurs when 2 different dna sequences are found in nuclear dna as a result of the occurrence of a random mutation. select one: true false
Answers
What is Heteroplasmy?
An individual is heteroplasmic when it has a mixture of two different populations of mitochondria or chloroplasts.
It is a phenomenon that occurs by the accumulation of errors during replication and by damage caused due to free radicals from the oxidative environment of the entire organelle.
It can be transmitted to offspring, if it occurs in gametic cells.
With this information, we can conclude that it is correct to say that heteroplasmy occurs when 2 different DNA sequences are found in the nuclear DNA.
Hardwired characteristics of the brain that attempt to keep us in balance by correcting deficiencies are referred to as:
Answers
Hardwired characteristics of the brain that attempt to keep us in balance by correcting deficiencies are referred to as homeostatic mechanisms.
Homeostasis is the body's ability to maintain a stable internal environment despite external changes.
In the context of the brain, homeostatic mechanisms involve various processes that regulate physiological functions and maintain optimal levels of essential substances.
These mechanisms can include feedback loops that detect imbalances and initiate corrective actions.
For example, if there is a deficiency in a particular nutrient or hormone, the brain may activate mechanisms to increase its production, decrease its consumption, or enhance its absorption from the environment.
Homeostatic mechanisms play a crucial role in ensuring the body's overall stability and functioning, helping to maintain proper levels of various substances and promoting overall well-being.
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Q3.9. Suppose that, as you track the bison population described in the previous question, a new disease emerges, infecting adult bison. This disease increases the death rate of adults. If the disease persists in the population and has no other effect, how will the population dynamics of the herd change in the future? (Assume environmental conditions do not change.) The carrying capacity of the bison population will be lower than before. The birth rate of the bison population will be higher than before. The bison population will grow slower than before. The bison population will grow faster than before.
Answers
The bison population will grow slower than before due to the increased death rate of adults from the new disease, which will limit the population's size and reproductive potential.
What is bison population?
The carrying capacity of the bison population will also be lower than before due to the disease's impact on adult bison, further limiting population growth.
If a new disease emerges in the bison population, infecting and increasing the death rate of adult bison, the population dynamics of the herd will change in the future. The carrying capacity of the bison population will be lower than before, because the disease reduces the number of adults who can reproduce, and therefore limits the overall size of the population.
Moreover, the birth rate of the bison population may not necessarily be higher than before because the disease could also affect the reproductive ability of the bison, and even if it does not directly impact reproduction, the population may be limited by the lower number of adult bison that can mate.
As a result, the bison population will grow slower than before because of the increased death rate of adults due to the disease. In some cases, the population may even decline if the death rate exceeds the birth rate. Therefore, the correct answer is that the bison population will grow slower than before.
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A smooth, sustained contraction resulting from very rapid stimulation of the muscle, in which no evidence of relaxation is seen, is called (a) a twitch, (b) wave summation, (c) multiple motor unit summation, (d) fused tetanus.
Answers
A smooth, sustained contraction resulting from very rapid stimulation of the muscle, in which no evidence of relaxation is seen, is called fused tetanus.
Adjusting the frequency of muscle stimulation (i.e., going very quickly) causes a smooth, prolonged contraction known as fused tetanus (i.e., complete tetanus). Because there is no relaxation in between the individual twitches, it is smooth and not trembling.
When there is a fast rate of stimulation and there is no relaxation of the muscle fibres in between stimuli, this condition is known as fused tetanus. The strongest single-unit twitch in a contraction is a fused tetanic contraction. When tetanized, the muscle's steady-state contracting tension remains constant.
Hence, tetanus is sustained contraction due to successive signals.
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the spreading out of molecules in air from a center of concentration is caused by
Answers
The spreading out of molecules in the air from a center of concentration is caused by diffusion. Diffusion is the movement of molecules from a region of high concentration to a region of low concentration.
This process occurs due to the random motion of particles, and it is driven by the natural tendency of particles to move from an area of high concentration to an area of low concentration.
Diffusion plays a vital role in many natural processes, including gas exchange in the lungs, transport of nutrients and waste products across cell membranes, and the release of odor molecules into the air.
In each of these processes, the molecules move from a region of high concentration to a region of low concentration due to the natural tendency of particles to spread out and become evenly distributed over time.
The rate of diffusion is influenced by several factors, including the concentration gradient, the temperature of the environment, and the size and shape of the molecules involved.
Diffusion can be a slow process, particularly over long distances or in areas where the concentration gradient is small, but it is a fundamental mechanism that underlies many of the processes that allow living organisms to function and survive.
Overall, the spreading out of molecules in the air from a center of concentration is an essential process that is driven by the natural tendency of particles to diffuse and become evenly distributed over time.
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Which biomes would a cactus belong to?
Answers
Answer: Desert Biome
Explanation:
Cactus would grow in the desert biome because it is dry and there is very little water there.
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example of osmoregulation
Answers
2 poin
LS1.AHS4. Which two organ systems provide materials required for the
human body to produce ATP?*
Reproductive and excretory
Digestive and respiratory
Respiratory and immune
Digestive and reproductive
Answers
Answer: Digestive and respiratory
Explanation:
Digestive system provides glucose and the Respiratory system provides oxygen, both are reactants for cellular respiration.
What types of molecules are moved by active transport?
A. Large molecules
B. Ions
C. Any molecule that is on the low side of concentration gradient
Please help!!
Answers
C. Any molecule that is on the low side of concentration gradient
C
Do you want an explanation
in what type of cells would you expect to find a large amount of smooth endoplasmic reticulum?
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Smooth endoplasmic reticulum (SER) is an organelle found in eukaryotic cells.
the SER plays a critical role in a number of cellular processes such as lipid metabolism, detoxification of drugs and toxins, and calcium storage.
SER is abundant in cells that are specialized for the production and secretion of various substances. For example, liver cells or hepatocytes are involved in the detoxification of toxins and drugs and hence are enriched with SER.
SER contains a group of enzymes called cytochrome P450 enzymes that are responsible for breaking down and modifying drugs, hormones, and toxins. The abundant presence of SER in liver cells reflects their high metabolic activity and their role in detoxification.
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Which statement BEST explains why viruses can only reproduce within a host?
O Viruses lack the organelles necessary to reproduce
O Viruses lack the genes necessary for transcription.
Viruses need the host cell to break down their cell membranes.
O Viruses need the host to provide nutrients.
Answers
Answer:
Viruses depend on the host cells that they infect to reproduce. ... When it comes into contact with a host cell, a virus can insert its genetic material into its host, literally taking over the host's functions. An infected cell produces more viral protein and genetic material instead of its usual products.
Explanation:
The viruses can only reproduce within a host lack the organelles necessary to reproduce.
Virus:
These are small particles that reproduce only inside the host cell like bacteria or eukaryotes.
Viral structure includes 2 components, Capsid and genetic material.
Capsid is made up of protein and covers the genetic material.Genetic material can be DNA and RNA and help virus to reproduce.Viruses do not have ribosome or other organelle to translate their mRNA.Therefore, the viruses can only reproduce within a host lack the organelles necessary to reproduce.
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Can DNA replicate if there are no nucleotides of one base!
Answers
Answer:No.
Explanation: DNA needs RNA to properly replicate to create offspring. Whether it be it MUST be incorporated into the DNA chain for it to replicate properly.
A person who is heterozygous for a gene with dominant and recessive alleles ____________ (will/will not) express the trait.
Answers
It is going to be will. any other questions?
Consider the following experiment. First, large populations of two mutant strains of Escherichia coli are mixed, each requiring a different, single amino acid. After plating them onto a minimal medium, 45 colonies grew. Which of the following may explain this result?
(A) The colonies may be due to back mutation (reversion). B) The colonies may be due to recombination.
C) Either A or B is possible.
Answers
The correct option is (C) Either A or B is possible. A minimal medium is used to grow Escherichia coli strains of two different mutations. After that, the strains are mixed, and a total of 45 colonies are obtained. This might be due to either back mutation or recombination.
In biology, colonies are a community of microorganisms, such as bacteria or yeast, that grow together. Microbiologists refer to bacteria as "colony-forming units" (CFUs), which are clusters of cells that are genetically identical.
A small number of bacteria or fungi present in a sample will be plated out to grow into a colony. The colony is made up of billions of genetically identical cells, making it a pure culture. To separate different bacterial species, microbiologists can rely on the shape, color, size, and other characteristics of colonies.
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how do the four tissues support the function of the heart
Answers
The heart is made up of four different types of tissues. The four tissues that support the function of the heart are as follows:
1. Epithelial Tissue
2. Muscle Tissue
3. Nervous Tissue
4. Connective Tissue
The Epithelial Tissue forms the lining of the blood vessels and the inner surface of the heart valves. This lining helps to reduce friction and increase blood flow.
The Muscle Tissue is responsible for contracting and relaxing the heart muscle, which pumps blood through the body. The Nervous Tissue coordinates the beating of the heart and helps to regulate its function. The Connective Tissue provides structural support and helps to hold the heart in place.
The tissues in the heart work together to ensure that blood is pumped efficiently through the body. The epithelial tissue helps to keep the blood flowing smoothly through the heart, while the muscle tissue contracts and relaxes to pump the blood.
The nervous tissue ensures that the heart beats at the right rate and rhythm, while the connective tissue provides the structural support necessary to keep the heart in place. All four tissues work together to support the function of the heart.
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