to support life, why must a planet have a roughly circular orbit around a sd tar? A. so fresh water is available. B. to keep the proper air molecules in the atmosphere. C. to support chemical reactions. D. for temperature regulation

Name each layer of earth starting from the center include both layers of the core and all layers of the mantle

The geometry of a solar eclipses is as follows. A Earth moon sun B Moon earth sun C sun earth moon

Discuss the 5 elements that make up the chain of infection

How do sperms enter female body from penis

Early detection of substance abuse is important why?

Which of the following are functions of lipids? Choose three correct answers. A. forming the exoskeletons of insects B. forming waxy leaf coverings C. forming bones and cartilage D. storing energy in fat cells E. forming cell membranes F.

The ability of the body to undergo prolonged whole body, large muscle activity is:

In humans a gene that has been identifoef as causing a type of skin cancer is the

Which one of the "big 3" macronutrients is the most calorically dense at 9 calories per gram?

What happened at Chernobyl? (first to answer this will be marked as the brainliest)