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Delicious77 [7]
3 years ago
7

What is the first thing to occur in dna replication?

Biology
1 answer:
12345 [234]3 years ago
4 0
The first thing is that the enzyme, DNA helicase
breaks the hydrogen bonds to unzip the double strand of dna for replication to take place
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Type your response in the box.
Semenov [28]

Answer:

generic variation helps species survive because it gives there offspring there traits to survive

Explanation:

3 0
3 years ago
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In soils with distinct soil horizons, the bottom zone is the..... a.) parent material b.) a horizon c.) b horizon d.) subsoil
pentagon [3]

The correct answer is option (a). Parent material

The soil horizon refers to distinct layers of the soils, which are parallel to one another, but have a different composition from the layer present above and below to it.

The soil horizon can be divided into four different layers. First one is organic layer, which is the topmost layer, below this layer second layer of topsoil is present. Below top soil, subsoil is present. Below subsoil, the bottom most horizon parent material is present.

8 0
3 years ago
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1. Which of the following are factors that both unicellular and multicellular organisms actively balance in order to achieve hom
MrMuchimi
The correct options are as follows:
1. C
Homeostasis is the process by which living organisms maintains constant internal environment. Maintaining homeostasis is very important because the survival of the living organism depend on it. In order to maintain homeostasis, the amount of wastes, nutrients and water that is in an organism must be controlled and maintained at optimum level.
2. A.
An organism that can not maintain an homeostasis will die. This is because, lack of homeostasis will disrupt the biochemical reactions which sustains the life activities of the organism and once the biochemical reactions that produce life energy can no longer take place the organism will die.
3. A.
For both unicellular and multi cellular organisms, when they are exposed to water containing no salt, much of the water will move into their cells. This happened because, the level of salt in the interior of the living cells is higher and so the water will move from the medium which has no salt to the inside to the cell where there is salt. This process is known as osmosis. In osmosis water move through a semi permeable membrane from the region of low salt concentration level to the region of higher salt level concentration.
4. D.
Cells in living organisms are able to maintain homeostasis by specializing in specific functions and by working together in cooperatively. Each cell has its own functions which it performs; in the process of its duty, it communicates with other cells which also help it in order to achieve common goals, which is maintenance of homeostasis within the cell.
6 0
3 years ago
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When population growth increases in an area, what is happening to the birth rate and age structure of that population?
dangina [55]

Answer:

increasing birth rate with a greater number of young organisms

8 0
3 years ago
Which of the following is a way to conserve water quality?
NemiM [27]

Reducing the Chemicals dumped into wastewater

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2 years ago
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