What are the products for photosynthesis? A. Sugar + glucose
B. Carbon dioxide
C. Sugar + oxygen
D. Water + energy

When is your respiration rate likely to change? a. when your intestines are digesting b. when your cells have too much glucose c. when your cells need more oxygen d. when your liver is working after a meal

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

The cluster of developing cells from conception until birth is called an