B?
which describes the food chain for a human, squirrel, fox, and acorn?

a.

human→ fox→ squirrel→ acorn

b.

acorn→ squirrel→ fox→ human

c.

squirrel→ human→ fox→ acorn

d.

fox→ squirrel→ acorn→ human

Chlorophyll is found in plant leaves and absorbs light from the sun to enable plants to perform photosynthesis. magnesium is an important component of chlorophyll. the concentration of magnesium ions is higher in the root-hair cells of plants than in the soil. which mechanism of ion uptake would best enable a plant to produce a steady supply of chlorophyll? osmosis diffusion passive transport active transport

Which best describes the digestive system of arthropods? a incomplete, two openings b complete, one opening c two-way, one opening d one-way, two openings

Nerve cells are specialized to respond to stimulitrue or false?