The molecular clock tracks down nucleotide sequences for DNA or amino acids that contain sequences of proteins. Scientists use this to deduce the time in history where life forms possibly have diverged. This technique is also known as a gene clock or an evolutionary clock.
Answer :Four characteristics were to be used for the classification of all viruses:
Nature of the nucleic acid in the virion.
Symmetry of the protein shell.
Presence or absence of a lipid membrane.
Dimensions of the virion and capsid.
Explanation:
Answer:
A sperm and an egg each contain one set of 23 chromosomes The chromosomes that determine the sex of the baby, so yes
Explanation:
True examples of Cetaceans are Whales, Dolphins, and Porpoises.
<span>Energy in organisms is called homeostasis.</span>