Genetics (nature) and the environment (nurture) both play a role in IQ.

A. True
B. False

How does pregnancy begin? a) a placenta forms in the uterus b) a sperm reaches an egg in the fallopian tubec) the blastocyst differentiates into two cell types d) contractions begin in the uterine wallapex

Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays

Which member of the following food chain will be least affected by ddt, a pesticide water pollutant, if bio-magnification is occurring? algae> zooplankton> crayfish> leopard frog> large mouth bass