Which of the following ratios in a circle is equal to π?

radius to circumference

circumference to radius

circumference to diameter

diameter to circumference

Which statement best compares the moon and Earth?

What is conjugation? a. splitting into two b. splitting genetic material c. uniting and exchanging genetic material

Offspring from asexual reproduction have a better chance of survival in a changing environment

What is an advantage to alternative energy technology

Which of the following is an example of how the hypothalamus and the pituitary gland work together? Neurons in the hypothalamus stimulate the release of hormones from the pituitary gland that regulates hunger.

What percentage of water is lost through the respiratory system? 5 to 10 percent 10 to 20 percent 35 to 50 percent 50 to 75 percent

HURRY! The cell membrane is selectively permeable because of its molecular structure. Based on this, which one of these would NOT diffuse directly through the cell membrane?

What is the net force on 2-kg skateboard accelerating at a rate of 2m/s2?

Which of the following is one effect storm waves have on a beach?

What is the process known as in which there is a change in one form such as a tadpole into a frog?