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Nat2105 [25]
3 years ago
15

1. What percentage of the weight of Earth's crust is made of silicon?

Biology
1 answer:
sladkih [1.3K]3 years ago
7 0

Answer: 27.7 percent

Explanation:

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Question in link below.
bezimeni [28]

The correct answer is - They supply the energy needed for living processes.

Both the carbon and the nitrogen, are gases that are crucial for the survival of the organisms on the planet. They are mostly used by the producers in the ecosystems, as they need them to manage to perform their cycles, get nutrition, and of course energy. The producers are the basis of the ecosystems, so if they do not have a healthy supply of carbon and nitrogen, the ecosystems on the whole planet will collapse. The carbon and the nitrogen later go from one organism to another as the energy is transferred, and usually end up back into the atmosphere again.

4 0
3 years ago
What is one of the most common symptoms associated with the toxins from seafood?
vaieri [72.5K]
Symptoms usually appear 30–60 minutes after eating toxic shellfish and includenumbness and tingling of the face, lips, tongue, arms, and legs. There may beheadache, nausea, vomiting, and diarrhea.
7 0
4 years ago
A researcher is studying a population with a unique age structure. An age-structured histogram he has developed over the course
Rasek [7]

Answer:

The population first grows, stabilizes, and then declines.

Explanation:

A researcher is studying a population with a unique age structure. An age structured histogram he has developed over the course of several decades has undergone transformations in shape, from a pyramid shape to a roughly rectangular shape to an inverted pyramid shape (where the base is narrower than the top). The population first grows, stabilizes, and then declines.

6 0
3 years ago
Decreasing the rate of gene flow between two populations is likely to make the populations more different from one another. true
devlian [24]

The given statement "Decreasing the rate of gene flow between two populations is likely to make the populations more different from one another." is False.

<h3>What is gene flow?</h3>
  • Gene flow refers to the processes by which genes are transferred from one group to another.
  • Gene flow, which is a term used more frequently in anthropology, refers to the allelic change brought on by human movement.
  • Gene flow would reduce the isolation that could lead to speciation by increasing population similarity and reproductive kinship.
  • Gene flow significantly slows down speciation by recombining the gene pools of the groups and therefore repairing the growing variations in genetic variation that would have otherwise resulted in full speciation and the creation of daughter species.

Learn more about the gene flow with the help of the given link:

brainly.com/question/17190749

#SPJ4

5 0
2 years ago
When you begin an experiment why is it important to record your data
kykrilka [37]
Because if you come across something surprising, it's best to know how and why that happened
8 0
3 years ago
Read 2 more answers
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