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Mnenie [13.5K]
2 years ago
13

Cells lining the alveoli secrete a soapy substance known as:

Biology
1 answer:
ki77a [65]2 years ago
5 0
Answer: Alveolar surfactant

Surfactant Alveolar is a type of substance secreted by pneumocytes II (one type of cell that forms the epithelium in the alveolar membrane). This substance  is known as an tensioactive agent, decreasing the surface tension within the alveoli.


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Charles Darwin observed a unique beak size and shape in the finch population of each of the Galapagos Islands that he visited. 4
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Natural selection would probably favor different varieties in the different islands. In other words, beaks changed as the birds developed different tastes for fruits, seeds, or insects picked from the ground or cacti (due to lack of food resources). Long, pointed beaks made some of them more fit for picking seeds out of cactus fruits.

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7 0
2 years ago
Due to the Earth's shape and orientation, areas near the equator receive the greatest amount of energy from the Sun. Ocean curre
kirza4 [7]

The answer is B. Warm current move away from the equator towards the poles while cold currents concurrently move towards the equator. This process is known as thermohaline circulation. The cold currents due to higher density move in the great depth of the oceans while the warmer currents are on the surface due to their relatively lower density.






5 0
2 years ago
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Your assignment in biology lab is to design an experiment that would detect whether a substance is breaking down, or digesting,
Elis [28]

Answer: Option B

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Option B is correct because it has all three criteria-                                                                                   1. Control [water + protein]                                                                                                               2. With enzyme [egg white + pepsin]                                                                                           3. With acid and enzyme

So this will give us an idea whether pepsin alone is breaking down the protein or digesting it. And there would be difference in test tube B and C. So this will clear the difference.

Option A is incorrect because it has not mentioned any different test tube for checking what happened with the protein. And, Option C is incorrect because mass of egg white will remain same after digestion also.

6 0
2 years ago
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cluponka [151]

Answer:

Nucleotides

Explanation:

6 0
2 years ago
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Degger [83]

The answer is The ions are protected inside the lipid bilayer so that it is not pushed back to a more polar environment.

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