When farmers want two desirable traits in cows, they often breed individuals that have those traits in the hopes that the offspring will have both desirable traits. What is this practice called? Variation

Adaptation

Natural selection

Artificial selection

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?

What part of the cell does 9 represent? a. cytoplasm b. lysosome c. ribosome d. centrosome

14) whenever diploid populations are in hardy-weinberg equilibrium at a particular locus a) the allele's frequency should not change from one generation to the next, but its representation in homozygous and heterozygous genotypes may change. b) natural selection, gene flow, and genetic drift are acting equally to change an allele's frequency. c) this means that, at this locus, two alleles are present in equal proportions. d) the population itself is not evolving, but individuals within the population may be evolving.