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Usimov [2.4K]
3 years ago
13

Active transport requires energy because it usually involves the movement of

Biology
1 answer:
hram777 [196]3 years ago
6 0

Answer:

D

Explanation:

When a substance moves from low to high concentration it is moving against its concentration gradient, which requires more energy.

A. It depends on where it is moving, not the substance

OB. This is describing diffusion

OC. Does not require energy, it is passive transport through a semi-permeable membrane

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In his attempt to develop a pneumonia vaccine, Frederick Griffith injected mice with various combinations of living and dead bac
n200080 [17]

Answer:

The mice died

Explanation:

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When Griffith injected mice with dead S bacteria and living R bacteria together, the mice died. Live R bacteria had taken up the genetic material or as Griffith called "transforming principle" from the dead S bacteria and transformed into S bacteria. So live S bacteria were present again and they killed the mice.

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A student used a ruler to measure a pencil, as shown below: A pencil beside a metric ruler. The ruler is scaled from 1 centimete
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7 0
3 years ago
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What is missing from the ecosystem during primary succession
Kaylis [27]

Answer:

competition

Explanation:

After an ecosystem has been destroyed because of certain catastrophe and all of the space that it occupied is totally cleared and open for overtaking, the primary succession comes in action. When the primary succession occurs, there's no competition, as pretty much everything has been destroyed from the previously existing ecosystem. The pioneers of the primary succession are organisms that do not require a lot to prosper, such as the mosses and lichens. As they start to cover the barren land, little by little they manage to change the composition of the rocks, thus resulting in the formation of the first soils. As that happens, the secondary succession comes on the horizon as now it has conditions for it, so the species from it overtake and replace the species form the primary succession.

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Answer:

D. Tree and car

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If biotic means living, and abiotic means non living, then a tree is living while a car is non living. It's also in the correct order.

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