Neurons are specialized cells that the human

a. think for itself
b. maintain homeostasis
c. redirect attention
d. tolerate addictions

What are characteristics of minerals? select 3 choices

Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?

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