Which statement best describes selective breeding? A. Individuals with genes that help them survive in nature are most
likely to reproduce.
B. Scientists use enzymes to cut DNA, copy it, and paste pieces of it
back together
O C. Researchers in a lab use cloning to produce organisms that have
identical genes.
D. People allow only organisms with certain traits to reproduce.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

Which kind of mutation has occurred when the codon for an amino acid is changed to a stop codon? a. a silent mutation b. a missense mutation c. a frameshift mutation d. a nonsense mutation