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xeze [42]
2 years ago
13

Describe one important piece of machinery in plant cells, and how that machinery helps keep plant cells alive. Pleas help. This

is a school assignment.
(This is 7th grade science).
Biology
2 answers:
Pani-rosa [81]2 years ago
5 0
I hope this counts - cell wall! helps keep most materials out but allows specific materials to pass through. animal cells do not have a cell wall
Savatey [412]2 years ago
3 0

Answer:

Cytoplasm

Explanation:

The Cytoplasm is a Jelly-like substance, where chemical reactions take place.

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marusya05 [52]
Answer: B

Why? It is not A or D for many reasons but cell differentiation is used for very specific functions as cell determination is used for different embryonic functions. Based on the diagram I seems to me that it is not very specific so that’s why I think it’s B
(If it’s not be then is 100% C but B makes more sense)

Hope this helps

8 0
3 years ago
In a river, large boulders are transported by _____. A. Solution B. Traction C. Suspension D. Abrasion
erma4kov [3.2K]
The correct answer is B. Traction
7 0
3 years ago
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Ethidium bromide is a common intercalating agent used to visualize DNA in electrophoresis gels by associating with the DNA in th
exis [7]

Answer:

EtBr inserts between the stacked bases in the DNA double helix.

Explanation:

  • EtBr is used for visualizing DNA bands as it fluoresces under the UV illumination.
  • EtBr is an aromatic compound that is capable of inserting itself between the stacked bases of the DNA double helix.
  • The hydrophobic environment around the base pairs where the EtBr intercalates is responsible for the fluorescence. As the EtBr molecule intercalates between these base pairs the cation of EtBr sheds the water molecules associated with it and this causes it to fluoresce under UV light as water is a quencher of fluorescence.
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3 years ago
Organisms like dogs Pinetrees and humans all use information in their DNA as instruction for building proteins if all these orga
klasskru [66]

Answer:

Pinecrest are a plan and are asexual, meaning they do not need a partner to reproduce. although humans and dogs a sexual reproducers, their DNA structure is different and not compatible with human DNA structure. thats why you can't breed a human and a dog.

6 0
3 years ago
The term central nervous system refers to the
Norma-Jean [14]
Central nervous systems refers to all the nerves within the body that controls the body's activity. It's controls the nerves from the brain to all body parts. It also controls how the brain functions and how we think. The central nervous systems helps us eat, think, move, etc.

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3 years ago
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