Which characteristic can be used to determine if an organism is living? A- size of the organism

B- ability to breathe oxygen

C- ability to respond to environmental changes

D- ability to move at various speeds

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 of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

Which material is commonly used as a culture medium for living cells