Which of the following microorganisms is unable to reproduce outside of a host? bacteria fungus parasite virus

Name the part of the the brain labeled "e".

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.

Which muscle cell structure stores calcium ions that are used to trigger the contraction?