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PIT_PIT [208]
3 years ago
14

The process of DNA replication occurs just before

Biology
2 answers:
Fantom [35]3 years ago
7 0
It happens right before the cell divides 
wel3 years ago
6 0
DNA replication occurs just before G2 of interphase. After G2 follows either mitosis or meiosis. DNA replication is the dna molecule unwinds, and the two sides split and then new nucleotides are added to each side until two identical sequences result.
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Where are the cells located that make up the SA node
nikklg [1K]

Answer:

in the wall of the right atrium of the heart.

Explanation:

The sinoatrial node (SA), consisting of spindle-shaped cells, initiates the electrical activity of the heart. From its location in the right atrium in proximity to the superior vena cava, the electrical activity spreads to the atria, whose cells are larger than those of the SA.

5 0
3 years ago
Down syndrome, the most common genetic condition in the United States, is also called trisomy 21. What does this mean?
77julia77 [94]

Trisomy=3 chromosomes; 1 more than the required pair (2)

21=the type of chromosome

So, here we can eliminate A and B.

Now we have C and D.

I know that when sperm cell(s) simultaneously fertilize [an] egg, a class of identical twins will form. Therefore, we can eliminate D, leaving us with merely C. Henceforth, C is your final answer.

4 0
3 years ago
Read 2 more answers
which of the statements is true of the gastric cavity of cnidarians? digestive enzymes released into the gastric cavity allow th
podryga [215]

This sentence is true in the case of gastric cavity of cnidarians - digestive enzymes released into the gastric cavity allow the consumption of whole prey such as fish.

Extracellular digestion is carried out by cnidarians, in which the cells that line the gastrovascular canal receive the nutrients and enzymes split down the food particles. With only one opening, the gastrovascular cavity that doubles as both the mouth and the anus in cnidarians acts as their only digestive system. There is only one entrance in the central gastro-vascular cavity, which serves as both a mouth and a drain for waste. Digestion occurs both within and outside of cells.

Cnidarians consume food through their lips, and the coelenteron then breaks it down. Waste products are subsequently eliminated either via the mouth or via cell surface via water circulation, while nutrients are then sent to other parts of the body for use.

Learn more about Cnidarians

brainly.com/question/3742497

#SPJ4

6 0
1 year ago
What is the meaning of the word meristem​
satela [25.4K]

meaning: type of tissue in a plant

5 0
3 years ago
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Imagine you have a layer of limestone with high porosity but low permeability. What can you do to increase its permeability to a
Alex_Xolod [135]

Answer:

The answer is remove the overburden  so that there will be less pressure trapping the water.

Explanation:

You can remove the overburden  so that there will be less pressure trapping the water.

8 0
3 years ago
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