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3 years ago

What are the 4 different types of bases in DNA and how do they pair?

Biology

1 answer:

Radda [10]3 years ago

8 0

Answer:

the 4 different types of bases - adenine, thymine, cytosine, and guanine

adenine always pairs with thymine, and cytosine always pairs with guanine.

(dont know how they pair)

Explanation:

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Scientists use a dichotomous key to help them identify and classify living things. the word dichotomous means

stepladder [879]

Answer:

Explanation:

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3 years ago

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select the cell cycle impairments that you predict would lead to cancer. recall that cancer arises from unregulated, repeated ce

Vera_Pavlovna [14]

Cancer cells can arise in a variety of ways, the most common, however, tends to be genetic mutations.

Genetic mutations can occur during the life of a cell due to outside factors such as:

The food we eat
The environment we expose the cell to
The substances that touch the cell (e.g skin cells)

That being said, the most common time for a genetic mutation to take place is during cellular division. During this time the DNA that encodes the cells is duplicated. Genetic mutations in this DNA sometimes cause the elimination of programmed cell death.

Programmed cell death is what tells a cell when it should stop growing and dividing. This is a regulatory function designed to keep the number of cells at a balance, growing only when needed. As this cell multiplies, this produces an increasing number of cells that will not die. The accumulation of these cells is referred to as cancer.

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2 years ago

Besides Darwin, the theory of evolution by means of natural selection was also independently proposed by:

lisabon 2012 [21]

Answer:

Option A is correct (Alfred Wallace).

Explanation:

Option A is correct (Alfred Wallace).

According to the evolution theory all living species are evolved from a simple life source with the passage of time.

Points of natural selection:

Genetic variation are passed from generation to generation but environment can cause variations too.
Individuals in species have gene variation which is due to random mutation
Those who can not adopt to environment can not have their genes pass to next generation.
Natural Selection is also called as "Survival of the fittest".

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3 years ago

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Why is the process of meiosis significant for humans?

icang [17]

We rely on Meiosis so that we can produce/have genetic diversity. It also enables us to have proper conditions for reproductive success.

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2 years ago

The energy required to lift an object is supplied by atp derived from the breakdown of molecules of

maks197457 [2]

ATP is derived from the breakdown of molecules of glucose. Glycolysis is

the metabolic reaction which converts glucose into ATP.

The energy in glucose has to be converted to a usable form by the cells

which is why it is always converted to ATP( Adenosine triphosphate). The

energy supplied by ATP is then used to perform various activities in the

body.

Glucose is a type of carbohydrate which is a means of energy in organisms.

The explanations given validates ATP has been derived from the

breakdown of molecules of glucose.

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2 years ago