are freshwater ecosystems with high biodiversity that are also declining in numbers. A. Lakes
B. Oceans
C. Wetlands
D. Rivers

Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics. which most likely affects the development of these traits? testes ovaries prostate gland vulva

Creation of an unnaturally uniform sample to represent a diverse populationcan be avoided by: a. including only willing b. asking another scientist for .c. choosing only identical participants.d. selecting individuals at random.

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?