Suppose a small river with a population of 10000 frogs becomes polluted with cadmium to a level of 3 mg per gallon per day, about how many bullfrogs would be expected to die? a) about 3,000 b) about 7,000 c) about 8,500 d) about 1,500

Suppose you are estimating the size of a blue crab population. what is the population size if the number marked in the first catch is 40, the total number in the second catch is 200, and the number marked in the second catch is 50?

How is the male reproductive system different from other body systems? it isn’t necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another. it is the only system that produces hormones in the male.

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome