Which of the following accurately describes algal blooms? a. algal blooms tend to free up nutrients. b. algal blooms provide additional oxygen to a body of water. c. algal blooms often supply nutrients for fish and invertebrates. d. algal blooms can ultimately poison the organisms living within the same body of water.

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