The triplet code can produce 64 possible codon combinations. What is an advantage of this? A. Every single codon specifies more than one amino acid. / B. Every single amino acid has more than one codon. / C. The first two bases of the codon specify the amino acid.

Answers

Answer 1

Answer:

The answer is B. Every single amino acid has more than one codon.

There are 20 different amino acids, but there are more than 20 combinations of three nucleotide bases on DNA. There are 64 different combinations of three nucleotide bases on DNA, which is about 3 times more than the number of amino acids. Therefore, every single amino acid has more than one codon is the right answer. But, it should be taken into consideration, that 2 out of 20 different amino acids have only one codon - methionine and tryptophan.

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The Calvin cycle includesA. The light-dependent reactions
B. An electron transport chain
C. The light-independent reactions
D. Photosynthesis

Answers

Answer:

C. The light-independent reactions

Explanation:

Photosynthesis consists of two phases: light dependent phase and light independent phase.

a) The light dependent phase of photosynthesis includes photolysis of water, release of oxygen and synthesis of ATP and NADPH.

b) Light independent phase of the photosynthesis includes chemical pathway to fix atmospheric carbon dioxide into glucose. Since this chemical pathway was first discovered by Calvin, it is called as Calvin cycle.

Which of the following best describes the interaction between Earth’s crust and living organisms?a.Raw materials essential for life are cycled through Earth’s crust.
b.Fossil fuels are a valuable energy source for the biosphere.
c.The continental crust allowed the evolution of life on land.
d.The crust recycles the organic materials in sedimentary rock.

Answers

The best answer is A. Raw materials which are essential for life are cycled through the Earth's crust. The crust is the uppermost layer of the Earth. In this layer many types of rocks are found. The crust is the also coined as the home of life since it has its own systems of mineral recycling which is essential for life here on earth.

Answer:

The answer is A

Explanation:

True or False: An organisms that reproduce through binary fission produce more diversity (variety ) in their offspring.

Answers

No , an organism produced by meiosis causes more diversity due to crossing over

How fast can a squirrel run?

Answers

squirrel's can run up to 20 mph

A feature in the early hominid was her apelike shoulders and forelimbs, but a pelvis that indicated that most of her body weight lay above her pelvis. Which best explains the fossil?

Answers

This fossil which has apelike shoulders and forelimbs feature is most likely a quadrudepal (walks on both hands and feet). Scientists might call this early hominid the Wish human. It's apelike structure could also indicated that she is a common ancestor to the chimpanzees.

Answer:

B. Scientists called her Lucy and her pelvis indicates she could walk upright.

Explanation:

The description provided aligns with the characteristics of the famous hominid fossil known as Lucy (Australopithecus afarensis). Lucy's pelvis indicated that she walked upright, and her apelike shoulders and forelimbs were adaptations that might have been retained from a more apelike ancestor. The term "Upright Human" is not commonly used, and the other options do not accurately describe the fossil and its characteristics.

Dan was running, and he tripped and hurt his knee. The pain signals were carried to his brain by the:A. sympathetic nervous system.
B. central nervous system.
C. endocrine system.
D. lobes of the brain.

Answers

Answer: Central Nervous System

Explanation:

The emotions such as pain, happiness, trauma and other sensory things are controlled by the brain. The things that we feel like pain, heat, cold et cetera are also controlled by the brain.

The nervous system has two parts peripheral nervous system and the central nervous system. The pain signals are carried from the knees to the brain by the central nervous system.

Answer:

It was central nervous system

Explanation:

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Mrs. Canales pointed to an apple sitting on her desk.She asked her students to describe any forces actingon the apple. This is what some of her stu-dents said.Archie: "The only force acting on theapple is air pressure."Sam: "There is one force acting on the apple. Gravity is the force that pulls onthe apple."Soledad: "There are two forces: the desk pushes up on the apple and gravity pullsdownward on the apple."Misha: "There are many forces acting on the apple; but, it is the holding force in theapple that keeps it on the desk."Tess: "There are no forces acting on the apple because the desk stops any forcesfrom acting on it."Which student do you most agree with?

The organic chemicals that help cell membranes to conserve internal fluids are _____. a. hormones b. phospholipids c. amino acids d. proteins