Assume that producers in an ecosystem have 1,000,000 kilocalories of energy. How much energy is available to primary consumers? this is the only question i dont understand on my worksheet please hellp

Aplant may open end close its stomata to prevent excess water loss and maintain

Give an example of a trait that is controlled by more than one gene.

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.