Despite problems with tagging organisms over extended periods of time, scientists do study populations for extended periods. Which of the following is not a case where a scientist would track individuals for an extended period?
a. studying the effect of contraceptives for population management of "pest species", deer for example
b. studying members of an endangered species to monitor longevity or reproduction.
c. studying the long term effects of a pollutant
d. studying how fish evade motor boats

Hormones are chemical molecules produced by endocrine glands. one such endocrine gland is the thyroid gland, which synthesizes the thyroid hormone, which in turn affects the heart muscles. which two statements describe the probable reason for the function of the hormone? the cells in the heart have specific receptors that allow for the intake of hormones. the heart and the endocrine glands have the exact same types of cells. all cells make the same types of hormones. thyroid hormones show their effect on the heart by means of specialized cells. thyroid cells and cardiac cells have different dna.

Coral have a symbiotic relationship with what in order to eat?

When sodium chloride dissolves in water the sodium cholride dissociates into?