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vampirchik [111]
3 years ago
14

What two things must be present for a mechanical wave to form?

Biology
1 answer:
maksim [4K]3 years ago
7 0

Answer:

b.energy andresistence

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Why is it necessary to have a constant input of energy into an ecosystem?
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If there was not a constant Input of energy into the ecosystem then nothing would have the power to do anything and nothing would be alive. the energy starts with the sun, then goes to plants, then animals that eat the plants, and then the animals that eat those animals, Ect. if this chain reaction did not happen then the plants wouldn't have to power to go through photosynthesis and then we would get no energy. the amount of energy lessen with every chain that it goes through, this is why we get more energy eating plants and why they are healthier.
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Freshwater marshes occur beside rivers and oceans ? True or False
Phoenix [80]

Freshwater marshes occur beside rivers and oceans.

Yes, this statement is true .

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Compare and contrast hydrolysis and condensation
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3 years ago
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Select all the correct answers.
Agata [3.3K]

Answer:

A) Plants can’t photosynthesize at night.  

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The visceral motor division of the PNS is also called the autonomic division. Which of the following are functions of this divis
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Answer:

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Muscles

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