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mojhsa [17]
3 years ago
15

TRUE OR FALSE - Volcanic eruptions and asteroid impacts can alter Earth's climate for years.

Biology
1 answer:
Trava [24]3 years ago
4 0
True, major events like a super volcano's or asteroid strikes can send tons of ash dust and debris into the stratosphere and cause global cooling. <span />
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I need some help with this question
Crazy boy [7]

Answer:

b

Explanation:

the seeds aren't eaten or destroyed

4 0
3 years ago
Read 2 more answers
The histone proteins are among the most slowly evolving proteins. For example, a histone protein called histone H4 in cows and p
juin [17]

The statement is true, histones are proteins that are high in the amino acids lysine and arginine, making them extremely basic in their structure.

Histones control the degree of packaging of DNA during the processes of gene expression, replication or repair of hereditary material, among many others.

Histones H2A, H2B, H3 and H4 are small and basic proteins that are highly conserved in evolution and are composed of a globular domain at the carboxy-end, and by regions known as "tails", which are found at the amino-terminal end.

These tails are high in the amino acids lysine and arginine, which give them a positive charge.

This region is the site of numerous post-translational modifications that, it has been proposed, would modify the histone charge, altering the accessibility of the DNA and the protein / protein interactions with the nucleosome.

Chromatin compaction occurs due to the interaction between the negative charges of DNA and the positive charges of amino acids, mainly located on the tails of histones H3 and H4.

Therefore, we can conclude that the modifications on the amino acids lysine and arginine that form the basic part of the histone structure alter their functions.

Learn more about histone proteins here: brainly.com/question/14984828

8 0
2 years ago
Match each word to its correct meaning.
morpeh [17]

Answer:

Radioactive decay means the process by which unstable nucleus of an atom spontaneously releases energy through the emissions of radiation used in dating fossils and rocks.

Relative dating mean the time required for half the atoms in an element to divide in half.

Explanation:

So radioactive decay belongs to A.

And relative dating belongs to B.

Please mark Brainlist if right

6 0
3 years ago
What ecological roles do liverworts mosses and hornworts play in the environment?
alexandr1967 [171]

They are among the first colonizers of an environment. This way they break down rocks and make nutrients available for other plants. They help in retention of water in a habitat and also shelter many microorganisms. They also decompose organic matter hence play an important role in the cycling of nutrient in the environment.


5 0
3 years ago
In complete sentences, describe how eukaryotic plant cells store and remove waste materials.
Aliun [14]
Plant cells have vacuoles and these can either store useful products or waste products. The cell can get ride of the waste by bringing it to the cell membrane and then the cell membrane closes around the garbage.  All of this is possible because of the vacuoles. 
7 0
3 years ago
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