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seropon [69]
3 years ago
11

Opening and closing of the heart valves is caused by

Biology
1 answer:
storchak [24]3 years ago
6 0

Answer:

The pressure differences on either side of the valve.

Explanation:

The heart valves open and close passively because of pressure differences on either side of the valve. When pressure is greater behind the valve, the leaflets are blown open and the blood flows through the valve. However, when pressure is greater in front of the valve, the leaflets snap shut and blood flow is stopped.

Hope this helps!

have a blessed day

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Where can the following organelle be found: Mitochondria. Also if it a multiple choice.
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Olenka [21]

The phylogenetic tree of organisms within the animal kingdom include characteristics below:

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<h3>What is phylogenetic tree?</h3>

A phylogenetic tree simply refers to a branching diagram or a tree showing the evolutionary relationships among various biological species of both plants and animals based on their similarities and differences; either genetically or physically

Generally, animals; be it vertebrates or invertebrates has the few characteristics below:

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In conclusion, the phylogenetic tree of organisms within the animal kingdom include all characteristics mentioned above

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BRAINLIESTTTT ASAP!!!
katovenus [111]
Can I have the brainliest?
positive impacts
Animals can be engineered to require less food, grow quicker, and leave behind less evironmentally damaging waste.
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-Animals can be engineered so their tissues, organs, and cells can be transplanted into humans.
-Animals can be engineered to produce certain substances that offer a new source of medicine.
-Animals can be engineered to reproduce much faster.

negative impacts.

It is unethical.
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-Some consumers are complaining that the animal drug rules do not regulate genetically modified animals properly.
-This process is potentially dangerous and can be very harmful.
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