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marin [14]
3 years ago
6

Which part of the eye is the opening through which light initially passes?

Biology
1 answer:
Alex Ar [27]3 years ago
5 0

Answer:

the pupil is the correct answer please mark as brainliest

Explanation:

The pupil is the small opening in the center of the iris through which light initially passes.

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Which statement correctly identifies one advantage and one disadvantage of relying on trains for
maksim [4K]

Answer:

The correct answer is - Trains can have inconvenient schedules, but produce less pollution than cars do.

Explanation:

Trains are expensive to build and also required land for making routes and stations and platforms for passengers but that can be reimbursed by fare in a longer time period.

Trains also produce pollution but in comparison to cars these are way less contribute to the pollution, However, these are not convenient as they start and reach at a specific time and also sometimes not comfortable like cars.

8 0
3 years ago
Biology help needed! Any help you can offer is greatly appreciated!
bearhunter [10]

Answer:

In the second picture, the answer is A to attach to a host cell.

In the third, the fourth and the fifth the answer is D.

Explanation:

6 0
3 years ago
Which of the following statements about osmosis is correct?
Pavlova-9 [17]

Answer:

D. The presence of aquaporins (proteins that form water channels in the membrane) should speed up the process of osmosis.

Explanation:

Water moves in the cells through osmosis which means water moves from its higher concentration to lower concentration. In many animals and plants, water channels are also present which is called aquaporins which allow the water to move through it in and out of cell more quickly.

The rate of diffusion by channel proteins is higher than simple diffusion therefore the aquaporins speed up the process of osmosis. No ATP is required to transport the water through aquaporin channel proteins.

5 0
3 years ago
Select all that apply.
erma4kov [3.2K]
Pure water is very close to a pH of 7. The Great Salt Lake (from what I've read about) can range from 8.2 to 7.7 in different areas. Saliva is between 6.5 and 7.5. And ammonia has a pH of 11.
So the items that have a pH between 5 and 8 are pure water, saliva, and possibly the Great Salt Lake.
5 0
3 years ago
How many fundamental forces exist in nature?
aleksklad [387]
Four fundamental forces 
<span>gravitation
electromagnetism
the weak interaction
the strong interaction.</span>
3 0
3 years ago
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