Viruses have both rna and dna
Essential amino acids are amino acids that must be supplied to one's body by their diet because they cannot be synthesized from scratch.
Answer:
The correct answer is None of these choices are correct.
Explanation:
Crossing over doesn't occur only between heterozygous genes, it also doesn't happen only in some chromosomes and it never reduces de variation, otherwise, the crossing over is one of the main causes of variation among species.
Answer: a low tide I would say around 5:02a.m.
Explanation:
The best shelling opportunities tend to happen during low tide, where the shells that are normally covered by water are left exposed on the sand.
