Which of the following chemicals is needed in order for cellular respiration to occur?

A: carbon dioxide

B: chlorophyll

C: oxygen

D: water

Food contains a sugar called ( ), which is broken down in a process called cellular ( ). this process uses ( ) to break down food molecules and provide energy for cells. fill in the parentheses

The negative impacts of nonnative species generally outweigh the positive impacts

Approximately what portion of the foods that we eat have been genetically modified in some way? a. fewer than 10% b. about 50% c. nearly 100%