BIOLOGY HIGH SCHOOL

How many possible codons exist in the genetic code? a. 3 b. 20 c. 46 d. 64

Answers

Answer 1
Answer: The correct answer is:
d. 64

in the genetic code there could be 64 different codons (each consists of 3 nucleotides)

Greetings, 
n00nst00p :)
Answer 2
Answer:

Answer:

there are 64 possible codons (4 × 4 × 4 = 64) in the genetic code

Explanation:

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Suppose you use a microscope to look at a cell from the leaf of a tree. What structure will you see that would not be found in a cell from your fingernail? A. mitochondria B. cilia C. cell wall D. ribosomes
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As hominids evolved, their litter sizes decreased and their gestation period increased. Which of the following inferences can be made based on this observation?Reproductive success would increase, since mothers had to carry fewer offspring.Hominids would have less difficulty finding mates, since competition is reduced.Maternal care for offspring would increase due to a greater investment to protect.Offspring would likely migrate in order to expand their territory and find mates.

What do birds have that distinguishes them from other organisms?a. Four-chambered he21
c. Amniotic eggs
b. Wings
d. Feathers

Answers

The answer is d. Feathers.

Feathers are epidermal growths characteristic only for birds and it is the trait that distinguishes them from the other organisms. 

The other three characteristics they share with other organisms:
- Four-chambered heart is a characteristic of crocodiles, birds, and mammals.
- Reptiles, birds, and mammals, belong to the group of Amniote, which means their eggs are amniotic. Amniotic eggs are either laid on land or retained inside the mother, unlike anamniotic eggs that are laid in the water.
- Wings are characteristic for birds and some mammals, such as bats. But their wings are analogues which mean they evolved independently.

A biologist is studying a structure that is made up of two layers of phospholipids what is she most likely studying

Answers

She is studying the Cell MEMBRANE which consists of a phospholipid bilayer and may also have a third outer-layer.

The pH of water is _____ because it contains an equal amount of H+ and OH- ions.

Answers

It's in the middle of the scale so it would be 7.0/neutral.

The answer is 7.0 (Neutral)

Which equation has a constant of proportionality equal to 4? a . 4y= 4x
b. 4y = 12x
c. 3y = 4x
d. 3y= 12x

Answers

the equation that has a constant proportionality equal to 4 is : D. 3y = 12x

3y = 12x

y   =   12x / 3

y   = 4x

Hope this help you out
Which equation has a constant of proportionality equal to 4?

Answer: Out of all the options presented above the equation that has a constant of proportionality equal to 4 is answer choice D) 3y= 12x. The reason being that if we simplify it we get that y = 4x.

I hope it helps, Regards.

All life must maintain an internal balance, despite environmental changes. This is called _____.

a.) stimulus
b.) heredity
c.) homeostasis
d.) evolution

Answers

Homeostasis is the answer
All life must maintain an internal balance, despite environmental changes. This is called _____.


c.) homeostasis

_______ refer(s) to specific molecular changes that occur when a drug binds to a particular target site or receptor, while _______ are the resulting widespread alterations in function.v

Answers

Answer: Drug action; drug effects

Explanation:

Drug action can be defined as the combination of the drug with the specific site of the receptor and brings about specific changes at the molecular level of the organism.

The drug effect can be defined as the physiological and biochemical changes that occur at the consequence of action of drug. The effects of the drugs on the body can be observed in the symptoms.
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