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

Aflashlight produces light using energy from the batteries. in which order does the energy change form? a. from chemical to electric to light energy b. from electric to light to chemical energy c. from electric to chemical to light energy d. from light to electric to chemical energy

Differentiation of cells changes the nucleic information. true false

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content