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a_sh-v [17]
3 years ago
6

HELP

Biology
1 answer:
Rufina [12.5K]3 years ago
4 0

Answers:

It is how oxygen and carbon dioxide travel across the cell membrane

Molecules travel with the concentration gradient

Explanation:

In simple diffusion, molecules move from an area of high concentration to area of low concentration until equilibrium is achieved. This occurs randomly unlike in facilitated diffusion where this flow is regulated through channels by facilitators. Nonetheless, these molecules still travel down the concentration gradient, similar to simple difussion.

Answer: Active transport

Explanation:

In this type of transport, energy is required. This is especially because, in endocytosis and exocytosis, the membrane has to form some structure (some form of a vessicle) to facilitate these transport modes. This requires energy from ATP. More so, usually transport in this case is against concentration gradient.

Answer:

Osmosis.

Explanation:

Osmosis is the movement of water from a lower concentrated solution to a higher concentrated solution through a semi-permeable membrane. In this case, the cell membrane has pores that allow only water molecules to pass through but the solute molecules are too large to pass through. Therefore only water is moving down its concentration gradient.

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Alfred Wegener's theory about earth's past included a supercontinent made up of all the continents put together. What was the na
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Describe the movement of the Sun, Moon, and stars as Earth rotates.
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Answer:

down below

Explanation:

The Sun, Moon, planets and stars make circles around the Earth. Since the observer is tilted with respect to Earth's rotation axis, the daily motion also appears tilted. In the Northern Hemisphere, the stars move to the south as they rise, while stars move northward in the Southern Hemisphere as they rise.

4 0
3 years ago
What is the ratio of the parental cross between Gg x gg
Mamont248 [21]

Answer:

Answer in explanation below!

Explanation:

I used a punnett square to figure this out!

phenotypic ratio ( meaning how it will look ) = 1 : 1  ( Gg = 50% & gg = 50% )

genotypic ratio ( the allele combo ) = 1 : 1  ( Gg = 50% & gg = 50% )

I hope this helps, good luck!

5 0
3 years ago
Which of the choices below is not a function of the urinary system? A. helps maintain homeostasis by controlling the composition
olga_2 [115]

Answer:

B. eliminates solid, undigested wastes and excretes carbon dioxide, water, salts, and heat

Explanation:

This is the correct answer with my knowledege and research.

Hope this help you :3

4 0
3 years ago
Hershey and Chase used a DNA-based virus for their work. How might the results have been different if they had used an RNA virus
4vir4ik [10]

Answer:

The correct answer is c.With an RNA virus, radioactive RNA would have been in the final pellet.

Explanation:

Hershey and Chase infected<em> E.coil</em> with bacteriophage which was having DNA as its genetic material. The bacteriophage was labeled with radioactive sulfur and radioactive phosphorus and it was radioactive phosphorus that was found in the bacterial cells or pellet.  

As because DNA contains phosphorus, not protein therefore they it was proved that DNA is the genetic material. Similarly, RNA is also a nucleic acid which is genetic material for many viruses and contains phosphorus.

So if Hershey and chase might have chosen an RNA virus then radioactive RNA would have been present in the pellet. So the correct answer is c.

7 0
3 years ago
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