What does a plant need to create a glucose molecule in photosynthesis? Choose all correct answers.

carbon dioxide

sunlight

water

oxygen

Which of these substances does not protect against invaders in the nonspecific immune response? a. saliva b. mucus c. tears d. urine

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic