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Llana [10]
4 years ago
7

DNA strands are held together by ____and separated by_____when dna copies itself

Biology
1 answer:
mash [69]4 years ago
6 0
DNA strands are held together by hydrogen bonds and separated by RNA polymerase when DNA copies itself.
i think the answer is right
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Can someone help me? please
spayn [35]
I think the answer is B
7 0
3 years ago
Read 2 more answers
A small population of mice is released into a meadow. Many but not all of the mice survive and reproduce, and this pattern conti
erastovalidia [21]
<h2>C) option is correct </h2>

Explanation:

Natural selection as proposed by Darwin is a selection pressure which operates in a population and allow the best fitted genotype to survive in changing environmental conditions and eliminate the other genotype which are not fit

Causes of natural selection include: Genetic drift, mutation(changes allelic frequency) and sexual selection

In the given example, condition necessary for natural selection to occur on the mouse population is traits that affect the survival of the mice vary among individual mice, in this condition superior genotype will get the opportunity to reproduce and inferior genotype does not get opportunity to reproduce thus their genotype in population does not increase rapidly and hence they become eliminated leading to genetic drift

8 0
4 years ago
Zebrafish have been genetically engineered to glow in the dark. What can be gained from research like this? (3 points)
Diano4ka-milaya [45]

The knowledge that can be gained from this is Knowledge about how genes work in vertebrates. Option D

<h3>What is genetic engineering?</h3>

Genetic engineering has to do with the procedure by which the genetic composition of an organism is modified. This is often carried out in a laboratory so as to produce new species of an organism or for scientific research purpose. We know that interaction of genes is determined by Mendelian genetics and the patterns of inheritance have been the constant subject of study.

As such, if a Zebrafish have been genetically engineered to glow in the dark, the knowledge that can be gained from this is knowledge about how genes work in vertebrates. We know that fish is an aquatic vertebrate because it possesses back bone as does other vertebrates (presence of vetebral column).

Learn ore about genetic engineering:brainly.com/question/13491558

#SPJ1

4 0
2 years ago
What is the name for the part of the Earth that has convection currents and
Dmitry [639]

Answer: C. Asthenosphere

Explanation:

because this lower layer of the mantle is the one that moves the plates of the earth.:)

5 0
3 years ago
PLEASEE NEED HELP ASP
Musya8 [376]

Answer:

The correct answer is -

nucleus - reproduction, mitochondria- reproduction, golgi apparatus - waste production, endoplasmic reticulum - growth, ribosomes - growth, lysosomes- waste production, vacuoles - growth, cell membrane - interaction with the environment, chloroplast - uses energy, cell wall - interaction with the environment

Explanation:

A Cell has various organelles with more than one generic function such as the nucleus not just play role in cell reproduction but also plays role in regulating other organelle and cell growth by transcription. Mitochondria produces and provides energy for many functions such as growth, reproduction and substance transport.

Golgi apparatus package proteins and wastes to transfer them out of the cell. The ndoplasmic reticulum modifies the protein produced by ribosomes and helps in growth of the cell. Lysosomes digest waste and cell debris by lysosomal vesicles. Cell membrane and cell wall interact with outer environement.

8 0
3 years ago
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