Which of the following accurately describes nutrient limitation? a. if one essential nutrient within an ecosystem runs out, primary productivity will be limited. b. limiting nutrients are the nutrients whose supply is in excess. c. soil environments aren't affected by nutrient limitation. d. nitrogen is typically the limiting nutrient in freshwater environments.

Anton created a chart listing different types of materials. which best complete the chart?

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 type of organism is a caterpillar