i should know this but i dont.
Explanation:
Answer: Option E) polar
Amino acid-derived and peptide hormones are unable to diffuse across a cell membrane because they are polar
Explanation:
Amino acid-derived and peptide hormones such as serotonin, epinephrine, dopamine etc, are unable to diffuse across a cell membrane because they consist of several repeating units of amino acids with positively charged or negatively charged side chains.
Thus, the side chains make these hormones water-loving (hydrophilic), and impassable to the hydrophobic layer of the cell membrane.
Answer:
A mountinrange
Explanation:
because the plates are moving away from each other
Answer:
hybridation. Puggle is a combination of two different species of dogs and the process of combining two different species to produce a new species is known as hybridation.
Answer:
It should be Mountain Range