Answer:
Brainliest pls
Explanation:
all of the organisms have to live without sunlight
Answer:
Internal fertilization has the advantage of protecting the fertilized egg from dehydration on land. The embryo is isolated within the female, which limits predation on the young. Internal fertilization also enhances the fertilization of eggs by a specific male.
Answer:
The macromolecules that forms pumps and channels in the cell membrane, allowing the entry and exit of molecules to the cell are protein.
Explanation:
Membrane integral proteins are a type of macromolecule attached to the structure of the membrane and have ends in contact with the cytoplasm and the extracellular medium.
These <u>protein molecules can act as channels and transporters or pumps</u>, to facilitate the passage of substances through the membrane. An example of transmembrane channels are ion channels, while a protein transporter is the sodium potassium ATP-ase pump.
Membrane proteins can also act as surface receptors and enzymes linked to the cell membrane.
The other options are not correct because
:
- <em><u>Carbohydrates</u></em><em> can be found on the membrane bound to other molecules, such as glycoproteins and glycolipids, but they do not act as pumps or channels.
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- <em><u>Lipids</u></em><em> have the function of being the main component of the cell membranes.
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- <em><u>Nucleic acids</u></em><em> are found in the nucleus, and are not part of the cell membrane.</em>
C. nucleus is the part of the atom that has most of its mass
Answer:
Cartilage
Explanation:
While you have bones in your ears, the cartilage is what gives your ear shape.