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Anestetic [448]
3 years ago
14

Changing a river into a lake is basically what a large dam does. One reason we do this to create reservoirs of fresh water. What

is another positive reason to build a dam? A) Dams can help control flooding. B) Dams are needed by certain types of fish. C) Dams drastically change the local ecosystem. D) Dams can help reduce the intense heat of summer.
Biology
1 answer:
inn [45]3 years ago
5 0
Pretty sure it's A. They help control flooding, and also provide recreation and hydropower. If this is incorrect, I'm sorry, but I hope it helps
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zhenek [66]
De answer is A!!!!!!!!!!!!!!!!!!!!!!!!!!!!


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3 0
3 years ago
What are the reactants in the equation for cellular respiration?
Afina-wow [57]
Glucose and Oxygen are the reactants
8 0
4 years ago
The gene pool for a particular population is made up of
Iteru [2.4K]

Answer:

A) all the genes that occur in the population.

Explanation:

The gene pool is defined as the set of all genes in population. The larger the genetic pool in population is, the grater genetic diversity is so the population can survive intense process of selection. On the other hand, low genetic diversity can cause reduced biological fitness and the chance of extinction is increased.

6 0
4 years ago
The rapid depolarization phase of the action potentials of myocardial contractile cells is due to which ion(s)? The rapid depola
fgiga [73]

Answer:

Na+ only

Explanation:

Depolarisation of membrane refers to the change in the resting membrane potential of the membrane of a cell which is usually -70mv to a more positive value.

This value changes when the positive ions move inside the cell which increases the positive charge inside the cell.

In the myocardial cell, the sodium ions move inside the cell which changes the potential towards the more positive side as a result of which the signals for contraction arises.

Thus, Na+ only is correct.

5 0
3 years ago
What does a pyramid of net production look like in a real ecosystem, and what are the trophic efficiencies? the pyramid below re
MatroZZZ [7]

Answer:

Idealized pyramid of net production uses the typical values of 1% for the conversion of sunlight energy to net primary production and 10% for trophic efficiency.

Explanation:

in real ecosystems, trophic efficiencies usually vary from about 5% to about 20%. As a result, net production diagrams for ecosystems have a pyramid shape. Two key factors explain why trophic efficiencies are relatively low, and thus why net production diagrams are shaped like pyramids. First, not all the organisms at one trophic level are eaten by organisms at the next trophic level. For example, not every plant is eaten by herbivores, and not every herbivore is eaten by carnivores. Second, because of the bioenergetics of animals, not all the food an animal eats is converted to new biomass.  Significant amounts of energy are lost in feces, used in cellular respiration, and lost to the environment as heat.

8 0
3 years ago
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