Which of the following is an EFFECT of nicotine found in cigarette smoke? * 1 point
A. increased heart rate
B. increased beating of cilia
C. reduced oxygen transport by the blood
D. increased mucus production in cell lining the respiratory passage

One of the purposes of transcription is to produce a sequence of bases that

How do all types of diffusion/passive transport actually ‘work’ without using even the smallest amount of cellular energy?

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