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den301095 [7]
3 years ago
7

Describe how building a dam for electricity affects an ecosystem.

Biology
1 answer:
tankabanditka [31]3 years ago
8 0

Answer:

The alteration of a river's flow and sediment transport downstream of a dam often causes the greatest sustained environmental impacts. Life in and around a river evolves and is conditioned on the timing and quantities of river flow. A dam also holds back sediments that would naturally replenish downstream ecosystems.

<em>Hope it helps</em>

<em>:D</em>

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Effectus [21]

Answer:

The correct answers are:

1. closing

2. the ventricles and arteries,

3. a constricted trachea

Lub is the first sound of a heartbeat and is mentioned as S1. It is usually produced due to the closing of tricuspid and and mitral or bicuspid valves present between atria and ventricles.

Tricupsid is located between atrium and ventricle of the right hand side and mitral valve is located between atrium and ventricle of the left hand side. They prevent the back flow of blood from ventricles to their respective atria.

Dub, being the second sound is written as S2. It is produced due to the closing of pulmonary (located between right ventricle and pulmonary artery) and aortic valves (located between left artery and aorta).

These valves prevent the back flow of blood from arteries into the ventricles.

The time between the two sounds is often taken as the measure of the diastole i.e. ventricular filling.

Wheezing refers to a high-pitched sound produced when a person breathes, especially during exhale. It is caused by constriction of the airways or inflammation. It is considered as a symptom of various diseases such as asthma, COPD, allergies, bronchitis etc.

8 0
3 years ago
Which part of the heart takes blood from the veins and pumps it into a ventricle?.
Savatey [412]
Answer:
The right atrium takes blood from the veins and pumps it into a ventricle

Please mark as brainliest
8 0
2 years ago
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Why does the nuclear membrane need to dissolve at the start of mitosis?
Molodets [167]

Answer:

The nuclear envelope does not disappear in metaphase of mitosis, because it already did in prophase. ... The nuclear envelope needs to be broken apart so that the chromosomes can be found, aligned in the middle of the cell, and then pulled apart.

Explanation:

4 0
3 years ago
True or false: the variable that is deliberately changed is called the responding variable.
Aliun [14]
The answer would be false.
4 0
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Does water evaporate faster than rubbing alcohol?
Stolb23 [73]
Water can take 8-9 days

rubbing alcohol can take less then 12 hours
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