Hawks are another major predator of rabbits. Rabbits in the wild tend to be light brown or brown speckled color. Occasionally there are white colored rabbits which the hawks can easily see. Why do some white colored rabbits remain in the population? *
A Mutations in the rabbit DNA
B They must be really fast.
C They find the best hiding places.
D The light brown rabbits can change their fur color in the summer

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.

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

Which line in the graph above best illustrates an effect of the carbon dioxide level in the blood on breathing rate before, during and after a period of exercise? 1.b,2.c,3.a,4.d