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Likurg_2 [28]
1 year ago
6

Many aquatic birds secrete waxy organic substances that repel water. The birds use these substances to coat their feathers. An a

nalysis of these substances would reveal that they are composed mostly of…
•Lipids


•Carbohydrates


•Nucleic Acids


•nucleic Acids
Biology
1 answer:
Sidana [21]1 year ago
4 0

Answer:

The correct answer would be - lipids.

Explanation:

Many aquatic birds secrete a waxy organic substance which coats their feathers and this substance allows their feathers to repel the water which is helpful for their flying even after floating in the water.

An analysis of these substances would tell that these substances are composed of lipids as lipids are the only macromolecules that are hydrophobic which means they try to avoid water and not allow water to pass through them.

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Egg membranes from three eggs were carefully taken out and labeled as a, b , c. Each of these membranes were filled with 1% solu
Readme [11.4K]

Answer:

The correct answer would be -

Membrane A - Hypotonic solution - the movement of water towards inside the cell

Membrane B - Isotonic soltion - there will be no movement of water

Membrane C - Hyertonic solution - the movement of water towards outside of the cell

Explanation:

This experiment deals with tonicity as this solution will affect the tonicity of the egg membrane. In membrane A there are more solutes inside the cell than outside the cell so it is hypotonic solution so the movement of water will be towards inside the cell.

In membrane B the solutes are equal in both sides so there will be no movement as its isotonic condition while in membrane C the solution is in hypertonic situation as the solutes are more outside than inside.

Thus, the behavior of the membranes are-

Membrane A - Hypotonic solution - the movement of water towards inside the cell

Membrane B - Isotonic soltion - there will be no movement of water

Membrane C - Hyertonic solution - the movement of water towards outside of the cell

8 0
2 years ago
The model below shows the structure of a portion of a plasma membrane in an animal cell. The model shows the structure of a port
Romashka-Z-Leto [24]

Answer:

The amphipathic property of the phospholipids that constitute the membrane

Explanation:

It seems like a options-based answer so it would be better if they were included here but basically, each of those phospholipid molecules has two parts with antagonistic reactions towards water.

The head is polar or hydrophilic, wich means it can be sorrounded by water. The tail, is apolar or hydrophobic which means it is repelled by water.

The interior and exterior of the cell is contain water-based substances, that's why the heads of the phospholipids are oriented like that with the tails protected inside the membrane.

This double layer structure has a fundamental role in the fluid property of the cell membrane from which derive most of it's functions.

3 0
1 year ago
Which motion of particles across a membrane requires energy
ivanzaharov [21]
A<span>ctive transport because passive transport does not as well as diffusion. 
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7 0
1 year ago
Read 2 more answers
You purchased equipment costing $1,000 to use for a lawn-mowing business to earn money for college during the summer. The first
rosijanka [135]

Answer:

$220

Explanation:

For Mowing:

Revenue:                                      $1,200

Additional cost:                              $(100)

Transportation cost :                      $(50)

Net Income               :                  $1050

For Painting:

Revenue:                                      $1,400

Additional cost:                              $(80)

Transportation cost :                      $(50)

Net Income               :                  $1270

Incremental Net income =   $1270 -  $1050

                                            = $220

7 0
1 year ago
Phosphatidylethanolamine has alternate pathways for synthesis. The reactions represent these pathways. Complete the reactions by
ELEN [110]

Find the attachment for the answer.

Note: I have added the complete question in the attachment.

5 0
1 year ago
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