Why cant planets take nitrogendirectly from the air?

Which organism contributes to soil formation in primary succession? A) lichens B) grass C) small plants D) trees

Which of the following is not true of Mendel's experiment? A. Mendel crossed two true-breeding plants. B. The yellow trait seemed to disappear in the first cross. C. The yellow trait reappeared in the second cross. D.

For those who were involved in the earthquake in Haiti was which category of stress? a) hassle. b) eustress. c) a major life change. d) a catastroph.

What term describes the number of individuals of a given species per unit area?

What is a sesamoid bone? a. A bone growing within some cartilages in response to pressure b. A bone made of dense regular connective tissue c. A bone made of hyaline cartilage d. A bone that forms within some tendons in response to stress e.

What is the difference between frond and cone

What was the relationship of the deer herd population size and the carrying capacity of the range in 1915 1920 1924?

What's happening in the evening of a hot summer day the air is cool but the sidewalk feels warm

Need the answer quickly A scientist observed that fiddler crabs are capable of plugging up the territorial burrows that they live in.

Calcium and bromine would join with a __bond and sulfur oxygen would join with a ___bond