The number of trophic levels in an ecological energy pyramid

a. is limited by the amount of energy lost at each trophic level

b. is impossible to figure out

c. is limitless

d. never exceeds three

In the ocean winds determine?

What is the basic structure of a virus? A. a bacteriophage surrounded by a membrane B. DNA or RNA surrounded by a protein coat C. a tiny cell surrounded by a cell wall D. a capsid surrounded by a protein coat

What prevents the Na + and K + gradients from dissipating? a. H+-K + ATPase b. Na + and K + leaks c. Na + cotransporter d. Na+-K + ATPase

What would be the best choice if you are going over 40mph and need to avoid an obstruction in an intersection?

How are two types onf carbohydrates formed

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?

What is the sequence of nursing actions to assess 4th degree perineal laceration?

In 1986, Chernobyl, a nuclear facility, was the site of a major nuclear accident in what country?