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valentinak56 [21]
3 years ago
7

A farmer grows wheat near a river. He frequently uses

Biology
2 answers:
Alex3 years ago
4 0

Answer:

D. Level of nitrates in runoff water

Explanation:

Took the test too :)

MrRa [10]3 years ago
3 0

Answer: I think its B

Explanation: I hope this helps :)

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A rise in the Earth’s average temperature of 5 degrees would probably occur over a few
olya-2409 [2.1K]

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D Centuries

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2 years ago
Why did bear island provide a great opportunity to decipher entire food chains?
Sergio [31]

Answer:

Due to the presence of limited number of species.

Explanation:

Bear island provide a great opportunity to decipher entire food chains because this island has many animals species which interact with each other or depend on one another due to the presence of less animals for feeding purpose. This island is isolated from the rest of the world so it provide a great opportunity to study the entire food chains that are present at that island. There is less number of species so knowing about their feeding choices is easier for the ecologists.

8 0
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In terms of gravitational political energy,what happens to a ball as it rolls down a hill?
Andrew [12]

The gravitational potential energy of the ball decreases as it rolls down the hill while the gravitational kinetic energy of the ball increases due to its acceleration in velocity.

4 0
3 years ago
Sodium ions, oxygen (O2), and glucose pass directly through lipid bilayers at dramatically different rates. Which of the followi
Elodia [21]

Answer:

The correct order, from fastest to slowest, for the passage of molecules and ions through the cell membrane is oxygen, sodium ions, glucose (option D).

Explanation:

The plasma membrane is a lipid bilayer, with glycoproteins and membrane proteins, which constitutes a semi-permeable barrier to the passage of substances into and out of the cell.

The speed with which a substance can pass through the membrane depends on its chemical properties -hydrophilic substances pass through with greater difficulty than lipophilic ones- requiring in some cases specialized transport mechanisms. The different rates with which a substance passes depends on this.

  • <em>Oxygen (O₂) </em><em>passes through simple diffusion, depending on a concentration gradient. It's the molecule that passes through the membrane the fastest. </em>
  • <em>In second place, there would be the </em><em>Na⁺ ions</em><em> -charged atoms- that cross the membrane by facilitated diffusion, through specific ionic channels. </em>
  • <em>The </em><em>glucose</em><em> molecule, being larger, requires the use of transport proteins, being its passage through the membrane slower with respect to oxygen or sodium.</em>

Undoubtedly, molecular weight and affinity for the plasma membrane are determining factors for the passage of molecules through the lipid bilayer.

Learn more:

Simple diffusion and active transport  brainly.com/question/6420224

4 0
3 years ago
This is the liquid. Within living cells. . It is important because it helps materials to spread through the cell
Oduvanchick [21]

Easy just get some water and get a cup and pow

5 0
3 years ago
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