I think that it’s A, D, and F
-the particles do not have a charge
-movement across membrane doesn’t require additional energy
-the particles crossing could be oxygen or water
Answer:
B
Explanation:
hope it helps:)))))))))))))))))))
Answer:
The number of habitats falls below a critical level.
Explanation:
The possible reason for extinction is that the number of habitats falls below a critical level. This makes it impossible for organisms to survive.
- A habitat is the dwelling place of living organism in an ecosystem.
- The resources and other materials that ensures the survival of an organism are made available in the habitat.
- When a habitat begins to thin out and can no longer support organisms, then extinction will ensue.
I believe the primary structure will be preserved. The secondary level of proteins is defined by patterns of hydrogen bonds between the main chain peptide groups. Therefore distorting the Hydrogen bonds disrupts the secondary structures. The primary structure on the other hand is not affected by disruption of the hydrogen bond since these structures refers to the sequences of amino acids in the polypeptide chains that are joined by the peptide bonds.
Answer:
bcz lichens grow only there have no pollution and new ecosystem have no pollution in this way lichen are necessary after disturbances bcz after pollution have created by human
