Genetic drift? a. a predictable event b. increases genetic differences between populations c. happens when random events change the genotype of s population d. happens when well-adapted organisms survive and reproduce more often than poorly-adapted organisms

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%

Has anyone taken the genetics unit test in connexus? not looking for answers, just a little bit what to expect and some with studying.

Once an egg cell is fertilized by sperm, the cell then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its mother's blood. a. becomes a fetus immediately and exits the womb b. begins to divide and implants itself in the wall of the uterus c. remains in the uterus without dividing for several months d. travels back to the ovaries until the fetus is developed