How did scientists obtain environmental DNA (eDNA) from carp in the waterways near Chicago? OA. They collected carp eggs, from which they extracted DNA.
B. They captured carp and extracted DNA directly from the fish.
O C. They extracted DNA directly from the wastes of the fish.
OD. They collected water samples and isolated DNA the fish had left behind.

Atest cross can be used to -predict the phenotypes of a monohybrid cross -predict an unknown genotype of a purebred dominant plant -cross-breed dominant and recessive plants -give probabilities that a trait will appear

Paleontologists have found plant fossils deep within the layers of the north polar region. these leaf fossils have been labeled as to the rock layers they were found in, with the lower numbers being layers close to the earth's surface and higher numbers representing deeper layers. according to the numbers of these four leaf fossils, what might you infer?

Researchers studying a small milkweed population note that some plants produce a toxin and other plants do not. they identify the gene responsible for toxin production. the dominant allele (t) codes for an enzyme that makes the toxin, and the recessive allele (t) codes for a nonfunctional enzyme that cannot produce the toxin. heterozygotes produce an intermediate amount of toxin. the genotypes of all individuals in the population are determined (see chart) and used to determine the actual allele frequencies in the population.is this population in hardy-weinberg equilibrium? a) yes.b) no; there are more homozygotes than expected.c) no; there are more heterozygotes than expected.d) more information is needed to answer this question.