Which is an example of the bottleneck effect?

Answers

Answer 1

Answer: A bottleneck is narrow, which means that only a some of the contents of the bottle can get out. From this effect, people use the word bottleneck when only a few individuals of a population survive.

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In a reverse reaction, products are formed from reactants and reactants are formed from products. When they yield the same amount, _____.Chemical equilibrium is reached

It is called the law of mass action

Activation energy is released

Answers

The statement that would complete the sentence would be the first. In a reverse reaction, products are formed from reactants and reactants are formed from products. When they yield the same amount, chemical equilibrium is reached.

Answer:

Chemical equilibrium is reached

Explanation:

Chemical equilibrium refers to the condition when the rate of formation of the product by the forward reaction is the same as the rate of formation of reactants by the reverse reaction. This leads to a balance between the concentration of reactants and products in the system and is called chemical equilibrium.

How is the process of natural selection involved in evolution?

Answers

Natural selection means that the organisms better adapted to their environment, that is, they have developed the right characteristics/skills/response to the external ambient, have higher chance to survive, making the next generations genetically inherit such acquired surviving characteristics.
These generations will thus have a higher chance of survival, making these species being "naturally selected" as survivors, while those who haven't or are slower in this process, have a higher risk of elimination.

Which four body systems interact to allow a person to sneeze? A) Muscular, immune, nervous, respiratory B) Nervous, respiratory, circulatory, skeletal C) Respiratory, endocrine, skeletal, circulatory D) Lymphatic, skeletal, respiratory, muscular

Answers

The four body systems that interact to allow a person to sneeze are the muscular system, immune system, nervous system, respiratory system (Option A).

Sneezing can be defined as an involuntary expulsion of air that helps to remove irritant particles from the nose and/or throat.

In the first place, the brain (i.e., the nervous system), when the respiratory epithelium (i.e., the respiratory system) is irritated, the endings of the cranial nerve sends a signal message to the brain to induce a sneeze reflex.

The muscles involved in sneezing include the chest muscles, abdominal muscles, diaphragm, and muscles that control vocal cords.

Sneezing is a fundamental immune response aimed at clearing the respiratory system of harmful pathogenic microorganisms (e.g. bacteria) and viruses.

In conclusion, the body systems that interact to allow a person to sneeze are the muscular system, immune system, nervous system, respiratory system (Option A is correct).

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Answer:

Explanation:

Muscular, immune, nervous and respiratory systems are involved in the process of sneezing. Sneezing is the natural defense mechanism of the human body. When any foreign particle enters the respiratory system then it irritates the respiratory epithelium and sends a signal to the brain through the 5th trigeminal nerve and sneezing reflex starts which involved skeleton muscles and respiratory system.

How would an injury in the central nervous system affect the peripheral nervous system? The peripheral nervous system would be prevented from sending information from stimuli receivers. The peripheral nervous system would not be able to process the information that it received from the stimuli receivers. The peripheral nervous system would block information from the central nervous system. The peripheral nervous system would have no information to send to the muscles and glands.

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the way that an injury in the central nervous system affect the peripheral nervous system is : The peripheral nervous system would have no information to send to the muscles and glands.The pheriperal nervous system is the one that sends out the response from the our brain to move our muscle. Without it, the response that transferred by our brain will not be carried out by the rest of our body.

The answer to this question is "D"

Left thumb over right is dominant, and is represented with a capital C. Right thumb over left is recessive, and is represented with a lowercase c.What would be the genotype of a person who naturally crosses his right thumb over his left when folding his hands together?

A) cc

B) Cc

C) CC or cc

D) CC or Cc

Answers

Answer: Option A) cc

Explanation:

For a given gene, there are 2 or more alternative forms present, and they are known as alleles.
The alleles are of two types - dominant and recessive.
The dominant allele is the one which expresses itself in both heterozygous and homozygous condition in the phenotype.
The recessive allele is the one which is only able to express itself in homozygous condition.
Since, the right thumb over left allele c is recessive, the person who crosses right thumb over left must be a homozygote, and hence his genotype should be cc.

In a certain plant, yellow leaves are dominant (Y) and red leaves are recessive (y). A plant with genotype Yy and a plant with Yy are crossed. If they have four offspring, how many would you predict would have red leaves?

Answers

1 plant. This is because offspring will only have red leaves if it receives yy, and there is a 25% chance of this, so 1/4 of the offspring will be predicted to have red leaves.

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To create a simulation of photosynthesis in a forest of 50,000 maple trees, a scientist needs to determine the average number of leaves on an actual maple tree. Which of the following is the best course of action for establishing this parameter?A. Determine the average number of leaves for 10 randomly selected maple trees. B. Choose a value at random to represent the average number of leaves on a tree. C. Count the number of leaves on a single tree and assume all trees are the same. D. Divide the total number of leaves on all the trees in a forest by 50,000.