Answer:
Hypothesized causes for the declines include habitat destruction (the most obvious cause), climate change, pathogens, introduced exotic species, pollution, and increased UV radiation. These agents may act alone or in combination to contribute to the decline of amphibian populations.
Explanation:
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Answer:
Minimizes repulsion between the valence electrons
Explanation:
The electrons repel each other, so the lowest energy state is one in which the electrons are as far from each other as possible.
Learn brail and test your hearing and smell.
Answer: Amino acids are organic compounds (molecules) that contain amine (–NH2) and carboxyl (–COOH) functional groups, along with a side chain (R group) specific to each amino acid.
Explanation: The variation seen in naturally occurring amino acids arises from differences in this side chain.
Magnolias, laurel, barberry, early sycamores, and palms.
