Select the correct answer
Which statement is true for chordate nerve cord?
A.
It is dorsal and hollow.
B.
It is ventral and hollow.
C.
It is dorsal and solid.

What percentage of light hits earth's surface directly?

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.

How does a catalyst influence a chemical reaction?