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ad-work [718]
3 years ago
6

Many children were paralyzed by polio in the 1950s. Today, polio has been reduced by 99 percent. Which statement best explains h

ow this disease has been almost eradicated?
A) Independent behavior helps humans live self-sufficiently and solve their own problems.

B) human communities use their ecosystems in creative ways.

C) human communities are learning to live with less money and fewer possessions.

D) Group behavior helps humans cooperate in order to accomplish large, complex tasks.
Biology
2 answers:
insens350 [35]3 years ago
4 0

Answer:

D

Explanation:

valkas [14]3 years ago
4 0

Answer:

B

Explanation:

The people are using their own ideas to help.

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sasho [114]

Answer:

Surface area to volume ratio, in simple means the size of surface area to the volume of substance that can pass through it at a particular time.

Amoeba and some bacterias are flat and have large surface area to volume ratio. So the diffusion rate is very high due to large surface area.

Where as humans have small surface area: volume so diffusion is very slow or does not take place at all.

Explanation:

As the ratio gets smaller, it takes longer for items to diffuse.

Explanation:

When the cell increases in size, the volume increases faster than the surface area, because volume is cubed where surface area is squared.

When there is more volume and less surface area, diffusion takes longer and is less effective. This is because there is a greater area that needs to receive the substance being diffused, but less area for that substance to actually enter the cell.

this is actually why cells divide. When they become too large and it takes too long for them to transport materials across the cell, they lose efficiency and divide in half to raise the surface area to volume ratio.

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3 years ago
Compare how active solar heat and passive solar heat structures work differently to gather heat from
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Answer:

Active heating captures sunlight, either as heat or electricity, to augment heating systems, while passive heating captures heat from the sun as it comes into your home through windows, roofs and walls to heat objects in your home (hope that helped?)

Explanation:

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Biotic and abiotic a moth immediately
Natasha_Volkova [10]

Answer:

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Explanation:

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The passing of electrons along a series of molecules, releasing energy bit- by-bit as they go, is called the 1. Calvin Cycle 2.
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