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borishaifa [10]
3 years ago
14

Plz help I will mark you brainlist plz help ​

Biology
1 answer:
mina [271]3 years ago
8 0

Answer:

By running them under water. The water will separate the rocks from the dirt.

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Is the crayfish most vulnerable to its enemies from the dorsal side or ventral side? why?
Alexus [3.1K]
<span>Most vulnerable side is the ventral because in the dorsal side there is the backbone. Most of the harder bones are on the dorsal side. So then the ventral side also known as the belly side is more vulnerable and softer.Sorry I took Forever LOL</span>
6 0
3 years ago
State two features in the nephron that facilitate ultrafiltration​
valentina_108 [34]

Answer:

The glomerulus is a knot of cappilaries inside the Bowman's capsule. ... Podocytes are cells that have 'foot-like extensions' which are wrapped around a capillary. This increases the surface area for filtration.

Explanation:

6 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
What is the connection between energy and climate refugees?
Otrada [13]

Answer:

Results suggest that under present circumstances, Australia and the USA each should take responsibility of 10 per cent each of the overall global share of climate refugees, followed by Canada and Saudi Arabia (9 per cent each), South Korea (7 per cent) and Russia, Germany and Japan (6 per cent each).

Explanation:

please mark as brainlist answers

6 0
3 years ago
"The ____ is the division of the autonomic nervous system that coordinates arousal and involves the expenditure of energy."
finlep [7]

Answer:

Sympathetic nervous system

Explanation:

The sympathetic nervous system is the part of the autonomic system of neurons which gets activated in the condition of stress.

The stress conditions activate the sympathetic nervous system which prepares the human body for the stress condition by either fight or flight mode.

The fight or flight responses requires a large amount of energy which are produced by the activation of the parasympathetic energy therefore the sympathetic system involves the expenditure of the energy. The system is also involved in sexual arousal.

Thus, the Sympathetic nervous system is the correct answer.

3 0
3 years ago
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