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antoniya [11.8K]
3 years ago
12

Question 15 of 20:

Biology
1 answer:
11Alexandr11 [23.1K]3 years ago
5 0

Answer:  b

Explanation:

An open system is when nutrients and waste are moved through the body   freely through the body cavity, rather than being enclosed in veins.

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2 Points
ale4655 [162]

Answer:

Your bloodstream.

Explanation:

The cells in your pancreas produce insulin which needs to be sent to the rest of your  body to tell your cells to take in glucose (sugar) for energy. In order to get sent out of  the pancreas' cells, the insulin needs to go through your bloodstream.

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3 years ago
How is relative-age dating used to determine the ages of fossils?
tino4ka555 [31]

Your answer should be A. by observing the formation of sedimentary rocks.

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3 years ago
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If a farmer wants to increase the health of his crops, he could apply a nitrogen-based fertilizer. Why is nitrogen important to
oksian1 [2.3K]
D proteins and enzymes
7 0
3 years ago
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Heyo friends I'm new here
Tomtit [17]

Answer:  The atmosphere prevents the sudden increase in temperature during the daylight hours. And during the night, it slows down the escape of heat into outer space The atmosphere keeps the average temperature of the Earth fairly steady during the day and even during the course of the whole year.

7 0
3 years ago
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If you ate more food from secondary consumers, how would this change the percentage of the biomass pyramid necessary to support
Anna007 [38]

Answer:

would increase

Explanation:

The pyramid of biomass is a diagram that exhibits the total biomass of the organisms at different trophic levels, which are required to support life in a given ecosystem. This pyramid usually starts with producers situated on the bottom (e.g., plants), then continues with the organisms that eat these primary consumers (herbivores), after with secondary consumers (carnivores), and so successively. The pyramid of biomass indicates the amount of mass of 1-primary producers required to support the life of the primary consumers, 2- primary consumers needed to support the life of the secondary consumers, 3-secondary consumers needed to support the life of the tertiary consumers, and so successively for each trophic level. In this diagram, the trophic level with a higher amount of biomass (and energy) is usually represented by the producers (i.e., by organisms on the bottom), and this amount of biomass decreases as long as more levels are considered. In consequence, if more food from secondary consumers is consumed, it will produce an increase in the percentage of biomass that is needed to support life.

5 0
3 years ago
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