HEL Use the drop-down menus to complete the statements about photosynthesis and cellular respiration.

Glucose molecules are a product of
during
. After heterotrophs ingest food, glucose molecules are broken down during
in
.

The body is protected against harmful flu viruses by

Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays

Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land