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Crank
3 years ago
13

Why do you think DNA is duplicated before

Biology
1 answer:
Anna71 [15]3 years ago
5 0

The two cells that result from a single cell need to have the same amount of genetic material as the initial cell, therefore the DNA needs to be duplicated before the cell divides.

The sister chromatids are attached together so that during anaphase the daugther cells will receive the same chromosomes

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Occurs naturally between organisms living in an environment with limited resources.
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I think the answer is A. Competition. :)
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What are the two major factors determining the distribution of terrestrial biomes?temperature and light temperature and rainfall
Natali5045456 [20]

Answer:

Temperature and light

Explanation:

This two factors are determinants in terrestrial biomes, because the temperature is closely related to rainfall, to the formation of glaciers, to the migration of species.    And the light is related from the use of these reay by the plant, through the greenhouse effect.   This two make the biodiversity to be what it are

4 0
3 years ago
Which structure in this plant cell represents the site of ATP production from photosynthesis?
ankoles [38]

Answer:

Chloroplasts

Explanation:

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8 0
3 years ago
9th grade biology question. 10pts
insens350 [35]

Answer:

b

Explanation:

7 0
3 years ago
Bacteria are extremely diverse in structure and in how they obtain energy and nutrients. This diversity enables bacteria to live
Mrac [35]

Answer and explanation:

Gram positive bacteria :

1) They retain crystal violet stain thus staining purple

2)They only produce exotoxins.

3)Peptidoglycan is thicker and multilayered

4)Techoic acids are present in their cell walls.

5)Lipopolysaccharides are absent in their cell wall.

6)No periplasmic space present

Gram negative bacteria :

1) They retain red safaranin stain thus stain pink.

2)They produce both exotoxins as well as endotoxins.

3)Peptidoglycan is thinner and single layered.

4)Techoic acids are absent in their cell walls.

5)Lipopolysaccharides are present in their cell wall.

6)Periplasmic space in present.

5 0
3 years ago
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