What do all ecosystems have?

A. biotic p21 only

B. abiotic p21 only

C. producers only

D. biotic and abiotic p21

If you were shipping green bananas to a supermarket thousands of miles away, which of the following chemicals would you want to eliminate from the plants' environment? a) cytokinins b) CO2 c) auxin d) ethylene.

Why do the cells of plant roots generally lack chloroplasts?

Escherichia coli, or E. Coli, is a species of bacteria. Entamoeba histolytica, or E. Histolytica, is a single-celled amoeba. What do E. Coli and E. Histolytica have in common?

The movement of organisms into a range is called?

Which of the following body parts has smooth muscles? Biceps Heart Triceps Stomach

Individual iv-3 is born as a male affected with condition b but not condition a. his parents are bred again, and an ultrasound shows that the fetus is another male. the relevant portion of the pedigree is shown below.

If a diet does not provide adequate carbohydrate to meet immediate energy needs, the body compensates by altering its metabolism of other nutrients. insufficient dietary carbohydrate can lead to elevated levels of ketone bodies.

If an enzyme-mediated reaction were carried out at a temperature that was higher or lower than optimal, the vmax for the reaction would probably be

Which of the following is not a mechanism of microevolution? Group of answer choices migration (gene flow) natural selection speciation genetic drift

What weather factor is also a measurement of energy held within the air? Humidity Pressure Temperature Wind