Consider the two tide cycles seen here. we have drawn a red line from the crest of high tide to the trough of low tide. what does this red line represent? a) a lunar day b) flood and ebb c) the tidal range d) the tidal current

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 is caused by reproductive isolation within a species? a. a decrease in gene flow b. an increase in genetic flow c. a decrease in genetic drift d. an increase in gene flow

How does climate change affect producers?