Before the 1940s, scientists believed that proteins, rather than dna, were the carriers of genetic material in the cell. why? a. proteins are present within the nucleus. b. proteins are routinely exported from the cell. c. proteins are abundant within the cell. d. proteins are able to self replicate. e. twenty different amino acids could produce a large number of unique combinations.

In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a ) moss sporophyteb) moss gametophyte bearing both male and female gametangiac) fern sporophyted) fern gametophyte bearing only antheridia

When ash and dust begin to settle on the ground, they eventually become compacted by

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.