What is the point at which DNA strand is unzipped so that it can form new complimentary strands?

Answers

Answer 1

Answer: DNA is unzipped by helicase at the origin of replication. There are several origins of replications in eukaryotic DNA replication, while only one in prokaryotic replication.

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Explain how competition could limit the size of a bird population
This experiment data confirms the
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How does a human insulin gene become part of a bacterium's plasmid?

Answers

1. Scientist remove plasmids, small rings of DNA, from bacterial cells

2. An enzyme cuts open the plasmids DNA. The same enzymes removes the human insulin gene from its chromosomes

3. The human insulin gets attaches the open ends of the plasmids to form a closed ring

4. Some bacterial cells take up the plasmids that have the insulin gene

5. When cells reproduce, the new cells will contain copies of the engineered
plasmids. The foreign gene directs the cell to reproduce human insulin.

What is the main cause of seasonal changes on earth? A.
the rate of earth’s rotation

B.

the speed of the moon’s revolution around earth

C.

the distance between the earth and sun

D.

earth’s axial tilt and distribution of sunlight on the earth’s surface

Answers

D because at some points the sun is closer making it hot...Then it is further away making it colder.

It's D--earth's axial tilt, and distribution of sunlight on the earth's surface.

Describe the conservation of mass in a food web

Answers

The conversation of mass means that no mass is destroyed nor created. In a food web, every mass (all the living things) die somehow and they all have a balanced diet. Also, they all fit into the web. If an animal is left out, or extincts, they law of conversation of mass is not being applied.

A group of egrets that live near cattle to feed off of insects disturbed by the cattle are an example ofCommensalism
Competition
Mutualism
Parasitism
Predation
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