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DaniilM [7]
3 years ago
14

What is the purpose of histones?

Biology
1 answer:
olchik [2.2K]3 years ago
4 0
Histones package and order DNA into the structural organized units called nucleosomes. They play a large role in gene regulation.
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Describe two adaptations you see on the rose plant, and explain how they are adaptations for defense, survival, or reproduction.
just olya [345]

Answer:

Thorns and colour.

Explanation:

The thorns are there to protect the stem from being cut or wild animals trying to eat it.

The colour is there to attract insects and pollinators to come and spread pollen.

3 0
2 years ago
Mitochondria and chloroplasts
Grace [21]

Answer:

C. prokaryotic cells

Definitions

The Mitochondrion is an organelle in the cytoplasm of cells that functions in energy production.

Chloroplast is usually defined as a plastic containing chlorophyll.

Chlorophyll is the green coloring matter of leaves and plants, essential to the production in a bluish-black form, C55H72MgN405 (chlorophyll a), and a dark-green form, C55H70MgN4O6 (chlorophyll b).  

A root cell is one of the maestro cells in the human organic structure that has possible ability of turning into any of the more than the organic structure's 200 cell types.  

Prokaryotes is any cellular organism that has no nuclear membrane, no organelles in the cytoplasm except ribosomes, and has its genetic material in the form of single continuous strands forming coils or loops, characteristic of all organisms in the kingdom Monera, as the bacteria and blue-green algae.

<h2>What are the similarities and differences between prokaryotes, mitochondria, and chloroplasts?</h2>

Both mitochondria and heterotrophic prokaryotes, as well as chloroplasts and autotrophic prokaryotes, have a genetic structure (DNA with a circular double helix shape and the genes themselves), as well as comparable ribosome types. In reality, the endosymbiotic idea is based on these parallels.

5 0
2 years ago
Pepstatin binds to the enzyme pepsin, the chief digestive enzyme in the stomach. The substrate (a protein) is still able to bind
swat32

Answer:

s

Explanation:

s

5 0
3 years ago
Veins have valves which allow blood to flow only in one direction. Arteries do not have valves. Yet the blood flows in one direc
Valentin [98]

Answer:

Arteries carry oxygenated blood away from the heart. Veins carry the blood back to the heart. Veins contain valves that ensure blood flows in only one direction. Arteries don’t require valves because pressure from the heart is so strong that blood is only able to flow in one direction.

Explanation:

8 0
3 years ago
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Which of the following reasons do scientists believe is responsable for climate change??
lapo4ka [179]
The answer is D.) Carbon Dioxide
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4 years ago
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