We eat food for energy. Plants provide energy for any animals. One important part of this food chain is missing: the source of energy for the plants. What is missing?

What's the sun made up of

Cooked vegetables must be held at what temperature

How do the respiratory and circulatory system work together. Describe their relationship.

U235 decays to Pb207. What is the half-life of U235

Organisms rely on both negative feedback processes and behavior to maintain

Which of the following statements is true? Tsunamis happen when backwash is stronger than swash. Mudflows are the slowest form of slope failure. Weathering is the movement of sediment from one location to another.

Where is a proton located in the atom?

List the ways in which tadpoles turn to frogs

How do oxbow lakes form

When alzheimer disease appears in middle age rather than old age, it: a. progresses more slowly. b. progresses more rapidly. c. causes death within a year. d. is benign?