Which predator uses camouflage to make it easier to catch its prey? katydid lion zebra arctic hare

In which part of the body is a ball-and-socket joint found?

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.

Darwin’s hypothesis about how life changes over time is now called?