BIOLOGY HIGH SCHOOL

What specifically is this biochemical used for, and how is it broken down during digestion?

Answers

Answer 1
Answer: digestion occurs in the stomach and the duodenum through the action of three main enzymes: pepsin, secreted by the stomach, and trypsin and chymotrypsin, secreted by the pancreas.During carbohydrate digestion the bonds between glucose molecules are broken by salivary and pancreatic amylase.The digestion of certain fats begins in the mouth, where short-chain lipids break down into diglycerides because of lingual lipase. The fat present in the small intestine stimulates the release of lipase from the pancreas, and bile from the liver enables the breakdown of fats into fatty acids.DNA and RNA are broken down into mononucleotides by the nucleases deoxyribonuclease and ribonuclease (DNase and RNase) that are released by the pancreas.

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Choose the sentence that best matches the context of the word reticent as it is used in the following example.We could talk about anything for hours. However, the moment I brought up dating, he was extremely reticent about his personal life.

a. He remained indifferent toward others.
b. He was usually a very quiet person.
c. He was an unsympathetic person.
d. He had nothing interesting to say.
e. He wouldn't readily reveal his feelings.

Answers

The correct answer is E. He will not readily reveal his feelings.

Reticent can be defined as a person who does not like to talk.

Reticent has different meaning. For example, It can be termed to somebody who is formal and restrained, Somebody who is not able to draw attention to oneself, and also reticent can also refer to a person who refers to seclusion to others.
e. He wouldn't readily reveal his feelings.

Reticent, according to dictionary.com, is not revealing one's thoughts or feelings readily.

Which of the following is characteristic of the parasympathetic division? A. stimulates secretory activity B. dilated airways C. increased heart rate D. inhibited digestion and elimination

Answers

The correct answer is: A. stimulates secretory activity  

Parasympathetic nervous system is a part of the autonomic nervous system (a division of the peripheral nervous system (PNS), so it means it regulates unconscious actions in an organism. Parasympathetic system is known as a system for stimulation of "rest-and-digest", when the body is at rest (differ than sympathetic which is active for fight-or-flight response). Parasympathetic system works usually after the meal and it is involved in the functions such as, secretory activities (salivation, lacrimation ), urination, digestion and defecation..

15. Which of the following is not an accurate description of chemical reactions? A. The rates of chemical reactions can vary. B. Chemical reactions that take in energy never need a source of energy to start. C. During chemical reactions, energy can be released or used up. D. During chemical reactions, bonds can be broken or formed.

Answers

The correct answer is "B".
  All chemical reactions require "activation energy". Activation energy can be thought of as kickstarting a chemical reaction. If you consider lighting a match, the match does not spontaneously combust upon its removal from the matchbox. You must kickstart the reaction by heating the chemicals in the match head. This heat is generated by the friction of rubbing the match head against the side of the box.In any case, reactions that take in energy, must take that energy from somewhere, so they absolutely need a source of energy to start, and to continue!
B is the correct answer I just took the test

Which type of fossil is Gerobatrachus hottoni most likely to be?intermediary
phylogenic
transitional
index

Answers

C. Transitional Fossil refer to the fossils which trains is the intermediary between it's ancestral group and derived descendant group,as a sign of evolutionary process

Answer:

Transitional

Explanation:

  • A fossil which has traits that are common to its derived descendant group, as well as the ancestral group, is known as the transitional fossil.
  • Gerobatrachus hottoni is known as the transitional fossil as it has characters that are common to frogs and salamanders and hence, is known to be a transition between the frog and the salamander.
  • It is to be noted that a transitional fossil is not a connecting link between the ancestor and the descendant.

Why is it important for scientists to develop a way to grow tissues that have a built-in system to supply blood

Answers

  • It is important for the scientists to grow the tissues that have a built in system to supply blood to decreases the chances of organ rejection.
  • There is a very serious issue regarding this the transplanted organ does not gets the vascular blood supply which is the main reason for organ rejection.
  • If there will be tissues with its own blood supply then it will not be ejected by the body.
A lack of blood flow determines the number of cell layers that can
survive when they are transplanted

If two mouse species tried to occupy the same niche in a meadow, the two species would be in __________, and the competitive exclusion principle would apply. One species would win out over the other, and the population of the losing species would die out. A. exclusion B. competition C. inclusion D. colonization

Answers

Answer: B. competition

Explanation:

A niche can be define as the functional role which an organism plays in an ecosystem to sustain it's life. For example, the type of food the organism eats, or type of habitat chosen.

Generally, when two species exhibit a same niche, competition for resources develop between the two species.

According to the competitive exclusion principle when two or more species compete for the same resource the one which is superior over the other receives the resources and the population of weaker species decline.

In the given situation competition will develop between the two species of mouse as they exhibit same niche and competitive exclusion principle on two mouse population will apply.
the correct answer would be b. competition   
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What is an ecological system consisting of all of its biotic and abiotic factors? a. community b. ecosystem c. habitat d. pure culture
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