Why is an amoeba not an animal?

a. It is asexual.

b. It is unicellular.

c. It is prokaryotic.

d. It is autotrophic.

How does the gray whale fit into the food web?

The energy in most ecosystems comes from the Sun. a. True b. False

A researcher designs an experiment to determine if German Shepherds prefer pet doors that opens from the side or from the top. He installs two pet doors side-by-side in the same wall.

Which product of cellular respiration is used by the human body for energy? oxygen ATP sunlight CO2

Sulfur emissions from industry combine with water in the atmosphere and form acid rain. A new factory is built very close to the lake that Josh visits often.

4. A tree dropping its leaves in the fall to conserve water and avoid freezing during winter is an example of?

Which is a single-celled fungus? A. mold B. mushroom C. alga D. yeast

Explain problems with using low-tar, low-nicotine cigarettes.

Some students are comparing the parts of a cell to the parts of the body. Which part best represents the cell membrane and why?

What is the difference between the nitrogen and carbon cycles?