Choose the true statement. a. prokaryotic cells are larger than eukaryotic cells. b. prokaryotes have membrane-bound organelles. c. prokaryotes have distinct nucleus. d. prokaryotes are only single-celled

Which flexible structure that supports the nerve cord and led to the backbone

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population. b) the separated population is small, and genetic drift occurs. c) the isolated population is exposed to different selection pressures than the ancestral population. d) different mutations begin to distinguish the gene pools of the separated populations. e) gene flow between the two populations is extensive.

What is the next step in muscle contraction after the actin changes shape