Which of these is an abiotic factor of an aquarium ecosystem?

a.
algae growing on the glass

b.
gravel on the bottom of the aquarium

c.
plants growing from the gravel

d.
fish swimming in the water

What is one benefit of a nonrenewable resource, such as natural gas? a. generate large amounts of electricity b. less expensive overtime c. produces pollution d. will run out eventually

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

Select the correct answer from each drop-down menu. during the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.