A gardener has a white-fruited squash plant he wants to breed to obtain only pure, white-fruited offspring. He doesn't know, however, if the plant he has is homozygous or heterozygous. Show how he could use a test cross to find out.

If a cell's main function is to produce proteins to be excreted, which organelles would you expect to be larger

In natural selection, what is actually “selected? ” a) alleles are directly selected b) genotypes are directly selected c) phenotypes are directly selected d) entire populations are directly selected

Up until 1938, paleontologists accepted the idea that coelacanths (an ancient fish) went extinct at the time that they last appear in the fossil record, about 80 million years ago. but in 1938, a live coelacanth was discovered off the coast of south africa that was compared to the fossil record and found to be the same species what goal of science does this discovery represent