A cage containing male mosquitoes has a small earphone placed on top, through which the sound of a female mosquito is played. All the males immediately fly to the earphone and go through all of the steps of copulation. What is the best explanation for this behavior? A) Copulation is a fixed action pattern, and the female flight sound is a sign stimulus that initiates it.
B) The sound from the earphone irritates the male mosquitoes, causing them to attempt to sting it.
C) The reproductive drive is so strong that when males are deprived of females, they will attempt to mate with anything that has even the slightest female characteristic.
D) Through classical conditioning, the male mosquitoes have associated the inappropriate stimulus from the earphone with the normal response of copulation.
Answers
The correct reply is B. copulation is a fixed motion pattern, and girl flight sound is a sign stimulus that initiates it.
What happens when a male mosquito bites you?When a mosquito bites you, it pierces the pores and skin using a one-of-a-kind mouthpart (proboscis) to suck up blood. As the mosquito is feeding, it injects saliva into your skin. Your physique reacts to the saliva ensuing in a bump and itching. Some human beings have solely a slight reaction to a chunk or bites
Are there male mosquitoes?Males mosquitoes are harmless, in general feeding on nectar, but our new lookup confirms they are just as annoying as female mosquitoes. Our study, posted in the Journal of Medical Entomology, dispels a common false impression that male mosquitoes avoid people.
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Tay-Sachs disease is a rare inherited disorder that progressively destroys nerve cells (neurons) in the brain and spinal cord. The most common form of Tay-Sachs disease becomes apparent in infancy. Infants with this disorder typically appear normal until the age of 3 to 6 months, when their development slows and muscles used for movement weaken. Affected infants lose motor skills such as turning over, sitting, and crawling. They also develop an exaggerated startle reaction to loud noises. As the disease progresses, children with Tay-Sachs disease experience seizures, vision and hearing loss, intellectual disability, and paralysis. Children with this severe infantile form of Tay-Sachs disease usually live only into early childhood.
Tay-Sachs disease has been identified in the HEXA gene. One of the known mutations can eliminate the activity of the enzyme, which prevents the enzyme from breaking down a fatty substance. As a result, this substance builds up to toxic levels, particularly in nerve cells in the brain and spinal cord. Progressive damage caused by the buildup of the fatty substance leads to the destruction of these cells, which causes the signs and symptoms of Tay-Sachs disease
Riley was diagnosed with Tay-sachs, which he inherited from both his parents. Riley received a mutated copy of the gene from his mom and a mutated copy from his dad. Neither of his parents has Tay Sachs disease. You must have two copies of the mutated gene in order to develop Tay Sachs disease.
What happened to the HEXA gene of Riley's parents?
What effect did the inherited mutated genes have on Riley at the cellular level?
Is this mutation beneficial, harmful, or neutral to Riley? Defend your answer.
Is this mutation physically beneficial, harmful, or neutral to Riley's parents? Defend your answer.
Does the Tay Sachs mutation increase or decrease genetic diversity? Explain your answer.
Answers
A genetic ailment called Tay-Sachs is passed from one generation of parents to the next.
What is Tay Sachs disease?When a child inherits a defect (mutation) in the HEXA gene from both parents, the condition takes place. The enzyme beta-hexosaminidase A is deficient as a result of the genetic mutation that causes Tay-Sachs disease.
The fatty compound GM2 ganglioside must be broken down in order for this enzyme to function. The brain and spinal cord's nerve cells are harmed by the accumulation of fatty substances.
A rare genetic illness called Tay-Sachs is inherited from one parent to the next. It results from the lack of an enzyme that aids in the breakdown of fatty compounds.
Therefore, A genetic ailment called Tay-Sachs is passed from one generation of parents to the next.
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Why does the skin of your mother's fingers shrink when she washes clothes for a long
time?
a. What is responsible for these changes? Explain the process in brief.
Answers
The skin of your mother's fingers shrinks when she washes clothes for a long time due to prolonged exposure to water. This exposure disrupts the natural balance of moisture in the skin, leading to the shrinkage.
1. When your mother washes clothes for a long time, her fingers come into contact with water continuously.
2. Water is a natural solvent and can dissolve substances, including the protective oils and moisture present on the skin.
3. The outermost layer of the skin, called the stratum corneum, acts as a barrier to prevent excessive water loss and protect against external factors.
4. Prolonged exposure to water can cause the stratum corneum to become saturated and swell.
5. As the stratum corneum absorbs water, it expands, which can lead to the appearance of wrinkled or shriveled skin.
6. Additionally, water exposure can wash away the natural oils that help keep the skin hydrated and supple.
7. Without these oils, the skin's natural moisture balance is disrupted, causing it to dry out and shrink.
8. Continuous wetting and drying cycles can further aggravate the skin's condition, leading to more pronounced shrinkage and roughness.
9. It's important to note that different individuals may experience varying degrees of skin shrinkage depending on their skin type, overall skin health, and environmental factors.
In summary, the prolonged exposure to water during clothes washing disrupts the skin's moisture balance, leading to the shrinkage and wrinkling of your mother's fingers.
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154. Two parent Holstein (black-and-white) cattle have multiple offspring. The fur ranges from black only, white only, and black and white. Which process best explains the variations in the offspring?
A. independent assortment
B. dominance
C. gene linkage
Answers
The Principle of Independent Assortment describes how different genes independently separate from one another when reproductive cells develop.
Why must everything but the
independent variable stay constant?
A. since a graph can only hold one variable
B. each group should be completely different to do an
experiment
C. because you can only record information for one
experimental group
D. because with too many variables you can't
determine what caused the
Answers
The independent variable should stay constant because each group should be completely different to do an experiment while it is being conducted.
What are variables?
The variables are defined as any characteristics, number or quantity which can be measured . They can also be called as a data item . They are called as variables because they can vary and can have variety of values.
There are three types of variables 1) manipulated variable where in a condition is specified, 2) responding variable which is dependent on manipulated variable 3)controlled variables which does not change
Example of manipulated variables are number of hours spent by a student studying , that of responding variable is result of a student and temperature is an example of controlled variable.
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Part A
In this experiment, you will place the container in the freezer. What do you think will happen?
30points✌✌✌
Answers
If you put a container of water in the freezer and the container is completely full and sturdy enough to prevent any expansion, the water will not remain liquid. Water expands when it freezes, and this expansion creates a significant amount of force.
How to explain the informationIn such a situation, the water will exert pressure on the walls of the container as it freezes. If the container is strong enough to withstand this pressure, it may remain intact, but the expansion of the water will cause the container to deform or rupture eventually.
However, it's worth noting that it is highly unlikely to find a container that is completely rigid and strong enough to prevent any expansion of water. The force exerted by freezing water is quite powerful, and it can typically overcome the strength of most containers.
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What happens if you put a container of water in the freezer, and the container is so full and so sturdy that the water has no space to expand into as it becomes ice? Does the water remain liquid?
• Research Alexander Fleming
• Find out:
• What he discovered
• How he discovered it
• What the impact of the discovery was
PLEASE HELP
Answers
Answer:
1) He discovered penicillin.
2) He accidentally discovered it when he went on vacation and came back to a green mould called penicillin had contaminated the Petri dishes in his lab and found that it was skilling the bacteria he had been growing.
3) Penicillin is extremely important. Wounds that would be fatal back in the day could be quickly treated with penicillin. Penicillin also inspired others to test other natural products that are now used today.
ILL GIVE U 45 BRAINLY AND MARK BRAINLEST IF ITS CORRECT
Answers
An allele that covers up another allele is a
Answers
An allele that covers up or masks the expression of another allele is referred to as a dominant allele.
Dominant alleles are those that exert their effects when present in a heterozygous state (with one copy of the dominant allele and one copy of a recessive allele) or in a homozygous state (with two copies of the dominant allele).
When a dominant allele is present, its characteristics or traits will be observable, overriding the effects of any recessive allele that may also be present. In this case, the dominant allele is said to be expressed, while the recessive allele remains unexpressed or hidden.
For example, in the case of eye color, brown eye color is typically determined by a dominant allele, while blue eye color is usually determined by a recessive allele. If an individual has one copy of the dominant brown allele and one copy of the recessive blue allele (heterozygous), their eye color will appear brown because the dominant allele masks the expression of the recessive allele.
Overall, dominant alleles have the ability to overpower or cover up the effects of recessive alleles, resulting in the manifestation of their associated traits.
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which definition best describes the term pharmaceutics? the science of preparing and dispensing drugs, and a very important part of pharmacotherapy the use of medicine to treat disease agents naturally produced in animal cells, in microorganisms, or by the body itself herbs, natural extracts, vitamins, minerals, and dietary supplements
Answers
Answer:
the science of preparing and dispensing drugs
In fruit flies, the gene for red eyes (R) is dominant and the gene for grey eyes (r) is recessive. What are the possible combinations of genes in the offspring of two red-eyed heterozygous flies?
Answers
When two heterozygous red-eyed flies (Rr) mate, their offspring can inherit one of two possible alleles from each parent: R or r.
Therefore, the possible combinations of genes in the offspring are:
RR (homozygous dominant, red-eyed)
Rr (heterozygous, red-eyed)
rr (homozygous recessive, gray-eyed)
The ratio of these genotypes in the offspring is 1:2:1, respectively.
A Punnett square can be used to identify the potential gene pairings in the offspring of two red-eyed heterozygous flies.
Each of the adult flies has one copy of the dominant R allele and one copy of the recessive r allele, making them heterozygous. Their genetics can be represented as Rr.
Red eyes are associated with the RR gene, and red eyes are also associated with the Rr genotype. (because the R allele is dominant over the r allele).
Grey irises are a characteristic of the rr genotype. In the progeny of two red-eyed heterozygous flies, the gene combinations may be homozygous dominant (RR), heterozygous (Rr), or homozygous recessive (RR). (rr).
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if you were to reach out your hand to receive a set of keys from someone, what movements of your forearm and hand would be involved?
Answers
When reaching out your hand to receive a set of keys from someone, your forearm would move forward while your hand would open and extend towards the keys.
Your fingers would then close around the keys, grasping them securely. To bring the keys back towards your body, your forearm would move backward while your hand remains closed around the keys.
The forearm is the section of the upper limb from the elbow to the wrist, whose bony structure is formed by the radius (laterally) and ulna (medially).
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The movement involves flexion at the elbow, wrist extension, finger flexion, and subsequent extension of the forearm and wrist.
To connect and get a bunch of keys from somebody, a few developments of the lower arm and hand are involved. The development principally happens at the elbow joint, which includes flexion of the lower arm towards the upper arm.
This activity is performed by the biceps brachii muscle situated at the front of the upper arm. As the lower arm comes to towards the keys, the wrist joint goes through expansion, or in reverse development, permitting the hand to get the keys.
The fingers then perform flexion, or shutting of the hand, to get a handle on the keys. At last, the arm and wrist are stretched out to bring the keys back towards the body. Together, these developments include the planned activity of a few muscles in the lower arm and hand to accomplish the ideal activity.
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Embryonic stem cells are undifferentiated cells. They can grow and divide giving rise to any type of tissue in a developing embryo. What must be true of the DNA in an organism's stem cells?
Answers
Answer:
Stem cells cut and repair their own DNA to promote formation of new tissues.
Explanation:
Stem cells cut itself and then repair their own DNA as a mechanism of activating genes that promote the development of new tissues. Stem cells are special type of cells that the ability to develop into many different types of cell such as muscle cells, brain cells etc. These cells are also capable to repair damaged tissues in the body.
What are water and carbon dioxide in the cellular respiration reaction?
CU
They are reactants because they are present before the reaction.
They are reactants because they are present after the reaction.
They are products because they are present before the reaction
They are products because they are present after the reaction
Save and Exit
Answers
Answer:
They are products because they are present after the reaction.
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Populations in wet regions of Africa are under strong selection for the sickle-cell allele due to the high prevalence of malaria. If we provided drugs to treat all malaria infected people in these areas, we would predict the frequency of the sickle cell allele to
Answers
If we provided drugs to treat all malaria infected people in these areas, we would predict the frequency of the sickle cell allele to decrease over time.
Describe malaria.Malaria is an infection brought on by a parasite. People contract the parasite by mosquito bites carrying it. The classic symptoms of malaria include a severe illness with a high temperature and shaking chills. Malaria is still common in countries that are tropical or subtropical, but it is uncommon in temperate regions.
Do bacteria or viruses cause malaria?Malaria cannot be brought on by a virus or bacteria. Malaria is brought on by a parasite called Plasmodium, which is frequently transmitted by infected mosquitoes.
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PLEASE HELPPP
Which process is responsible for the growth and repair of human tissue? A. Evolution B. Cell division C. germination D. Natural selection
Answers
Answer: B- Cell division
Explanation:
The process is called the the healing process. This is consisted of the inflammatory response, repair phase, and remodeling phase. Its gonna be b
Which phylum reproduces asexually through budding?
Answers
Answer:
Hydra
Explanation:
The correct answer is - Hydra
Reason -
Budding: Hydra reproduce asexually through budding, where a bud forms that develops into an adult and breaks away from the main body.
Helicase unzips what in the DNA molecule?
Answers
Answer:
nucleotide sequence
Explanation:
please mark me brainliest
Answer:
nitrogen bases
Explanation:
will mark brainliest
Answers
hahah you don't know this? can't imagine being that dumb must suck.
A critical rewiew of the literature is necessary in nearly all research projects. True False QUESTION7 OLioctivity and parsimony ase toet rolated to the rigor of an invesigatoo? Truse False QUESTION B Scientific itwestigatoo is characterized by a good theoretical base and a sound methodological design. These charactetistics are both relsted to the of the invesigation Wist must be filled on the line? Rigor Precision and contidance. Otinectivity Farnemeriv.
Answers
1. True 2. True 3. Scientific investigation is characterized by a good theoretical base and a sound methodological design. These characteristics are both related to the Option a. Rigor
True - A critical review of the literature is necessary in nearly all research projects. It helps researchers understand the existing knowledge and gaps in the field, identify relevant theories and methodologies, and build upon previous studies.
True - Objectivity and parsimony are both related to the rigor of an investigation. Objectivity refers to the impartiality and lack of bias in conducting and interpreting the research, while parsimony refers to the principle of simplicity in explaining phenomena or choosing the most straightforward explanation. Both objectivity and parsimony contribute to the rigor of a scientific investigation.
a. Rigor - Scientific investigation is characterized by a good theoretical base and a sound methodological design. These characteristics are both related to the rigor of the investigation. Rigor refers to the thoroughness, precision, and reliability of the research process, including the theoretical underpinnings and the robustness of the methods employed.
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The correct question is:
1. A critical review of the literature is necessary in nearly all research projects.
True
False
2. Objectivity and parsimony are both related to the rigor of an investigation?
True
False
3. Scientific investigation is characterized by a good theoretical base and a sound methodological design. These characteristics are both related to the of the investigation What must be filled on the line?
a. Rigor
b. Precision and confidence.
c. Objectivity
d. Parsimony..
According to modern cell theory, energy flow occurs around
the outside of cells.
TRUE
FALSE
Answers
Answer:
FALSE
Explanation:
Cell theory defines the cell being the fundamental unit that is the structural and the functional basis. The energy flows inside the cell. Thus, the statement is false.
What is modern cell theory?Cell theory gave the organizational and fundamental basis of the cell that is the same for both the eukaryotic and the prokaryotic cell including the multicellular and single-celled organisms.
The cells of the organisms all come from a pre-existing cell through reproduction and cell division. The cells are important and crucial for cellular and metabolic fiction.
The energy flows inside the cell in the mitochondria of the cell that power and act as fuel involved in the working of the cell by breaking the bonds stored in the sugar molecule.
Therefore, the statement is false.
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The vast fingerprint database held by the FBI can be scanned and is digitized by what instrument or technology?
Answers
Answer: computers.
Explanation: The database would cease to exist without the invention of computers and/or technology.
Which food has the most chemical energy?
A.BEEF
B.Carrots
C.celery
D.mushrooms
E.spinach
F.peanuts
Answers
What would most likely happen if the parietal cells in your stomach stopped functioning?
Answers
If the parietal cells in your stomach stop functioning The pH of the abdomen will rise.
Parietal cells, called oxyntic cells, are stomach epithelial cells that release intrinsic factors and hydrochloric acid (HCl). These cells are present in the stomach's gastric glands, which are situated in the fundus and body regions. Gastric acid secretion, which helps with food digestion, mineral absorption, and bacterial control, is controlled by parietal cells.
In the center of the glands in the fundus-body region of the stomach are the parietal cells. They release the intrinsic factor, a protein that binds vitamin B12, and gastric acid, or hydrochloric acid (about 0.16 M, pH 0.8). The parietal cells that are destroyed are unable to create enough stomach acid. As a result, the pH of the stomach rises, food digestion is hampered, and the risk of gastroenteritis increases.
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Question 8 of 10
Put these processes of the water cycle in the correct order starting from the
moment the sun transfers its energy.
1. The sun shines. Water evaporates into the atmosphere.
Water vapor condenses into liquid water and forms clouds.
* Rain, snow, or other precipitation falls.
11 Water collects in rivers, lakes, and other bodies of water.
Answers
The sun shines. Water evaporates into the atmosphere. Water vapor condenses into liquid water and forms clouds. Rain, snow, or other precipitation falls. Water collects in rivers, lakes, and other bodies of water.
What is water cycle?
The continual circulation of water on, above, and below the Earth's surface is referred to as the "water cycle," sometimes known as the "hydrologic cycle" or the "hydrological cycle."
The water cycle significantly affects the climate. For instance, a rise in temperature is a result of the greenhouse effect. The earth's temperature would rise sharply without the water cycle's evaporative cooling action. Other biogeochemical cycles also depend on the water cycle in one way or another. All organisms are affected by this cycle.
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Why is it important to récord all data and procedures in an experiment
Answers
It is important to record all data and procedures in an experiment because the evidence and the proof depend upon the data that is found in the scientific experiment.
What is the significance of the scientific data?The scientific data is important when the experiment is done, as from the data the result is gotten, and based upon the data, the research is carried out in a particular direction, and the further experiments and the possible mistakes can be identified through this data record.
Hence, it is important to record all data and procedures in an experiment because the evidence and the proof depend upon the data that is found in the scientific experiment.
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When the nerve cell is said to be resting this is interepreted to mean: O The cell is depolarized, the outisde is negative and the inside is positive O The cell is depolarized, the outisde is positive and the inside is negative. O The cell is polarized, the outisde is positive and the inside is negative O The cell is polarized, the outisde is negative and the inside is positive.
Answers
When the nerve cell is said to be resting, it means that the cell is polarized, the outside is positive and the inside is negative.
What is a nerve cell? A nerve cell, also known as a neuron, is an electrically excitable cell in the nervous system that communicates with other cells through specialized connections called synapses. A nerve cell is the structural and functional unit of the nervous system in charge of carrying electrical impulses throughout the body.
What is polarization?Polarization is a term used to describe the separation of electrical charges across a cell membrane. A resting nerve cell is polarized, indicating that the electrical charge of the cell's interior is negative in comparison to the charge of the cell's exterior. The inside of the cell is negative in comparison to the outside, so the resting potential is negative. During resting, the membrane potential of a nerve cell ranges from -60 to -70 mV.
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Wha do you think will happen to the size of the global human population in the long run?
Answers
How did tiktaalik provide evidence that amphibians evolved from fish?
Answers
Answer:
Tiktaalik fossils reveal how fish evolved into four-legged land animals. The report shows that the animal had a large, robust pelvic girdle, a prominent hip joint, and long hind fins. The powerful fins could have propelled the beast in the water, but also helped it walk on riverbeds, or scramble around on mudflats
in rabbits, short fur is incompletely dominant over long fur, which is recessive. if two heterozygous medium-furred rabbits mate, what is the chance that their offspring will be long-furred?
Answers
Based on the genotype of the parents, the probability of getting a long-furred offspring is 0.25
What are the genotypes of the parents?The genotypes of the parents are determined below as follows:
From the data given;
The parents are heterozygous medium-furred rabbits
Short fur is incompletely dominant over long fur, which is recessive.
let the allele for short fur be S
the allele for long fur will be s
The genotype of the parents will both be Ss
A cross between the parents will produce the following offspring
Ss x Ss = SS, Ss, Ss, and ss
The chance of getting a long fur offspring is 1 out of 4 or 0.25.
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The genome of escherichia coli consists of 4380 genes, encoding 4290 proteins, in just 5175720 base pairs. what percent fraction of the escherichia coli genes encode proteins?
Answers
According to the above formula, the percentage of genes that code for proteins is 97.95%.
Briefing:4380 genes are found in total.
4290 total proteins are encoded by the genes.
There are 5175720 base pairs overall.
Percentage of genes that code for proteins: Although there are 4380 genes overall, only 4290 of them code for proteins.
Total number of protein-coding genes divided by the total number of genes present gives the fraction of protein-coding genes (4290/4380), which equals 0.9795.
Percent fraction of genes encoding proteins
= Fraction of genes encoding proteins * 100
= 0.9795*100
The percentage of genes that code for proteins is 97.95%.
Where are the genes in DNA?Deoxyribonucleic acid (DNA) segments called genes are responsible for carrying out specified protein functions in one or more types of bodily cells. The structures called chromosomes found in cells house a person's genes. Chromosomes, which are found in the cell nucleus, are where genes are found.
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