Answer:
Glycine is required for purines, aspartate for pyrimidines, glycine and aspartate for both purines and pyrimidines. The remaining amino acids are not required for the synthesis.
Explanation:
Nucleotides are the monomer for the synthesis of DNA and RNA. The two main class of nitrogenous bases are purines and pyrimidines. These nitrogenous bases require the amino acids as a precursor for their synthesis.
Glycine is the simplest amino acid and required for the synthesis of purines. Aspartate is required for the synthesis of pyrimidines. Glutamine and aspartate are required for the synthesis of both purines and pyrimidines. Lysine, leucine, alanine, histidine, methionine, tryptophan and alanine are not used as a precursor for the nucleotides.
Answer:
It depends on the structure of labeled A.
Explanation:
If the diagram shows the structure of flower, so we can say that it has the ability to attract insects and other animals. If the diagram shows the structure of an insect such as bees so we can say that it can moves the pollen to the ovaries. If the diagram indicates the structure of pistil which is a female part of the flower so we choose that it catches the pollen and if the diagram represents the structure of anther which is a female part so we choose that it produces pollen.
D. Predators
Predators keep populations of other species in check. This was pretty clearly demonstrated in Yellowstone National Park after the wolves were eradicated there. The deer populations increased to the point that the aspen trees nearly disappeared due to the saplings' being eaten by deer. Since the reintroduction of wolves to the park, the aspen trees have begun to flourish once again.
Either fibrillation or Cardiac Arrest
