There are more than 600 muscles in the human body. Your heart is a muscle. Muscles make you breathe and muscles hold you upright. Which of the following statements is correct?

Blood stem cells may develop into any kind of human blood cells. what kind of stem cells are blood stem cells? a. multipotent stem cells o b. totipotent stem cells o c. pluripotent stem cells o d. unipotent stem cells

The frequency of alleles in a population that is in hardy weinberg equilibrium? a . changes in each successive generation b. is less important than the frequency genotypes c. shows evidence of the process of natural selection d. remains the same over several generations

Coral have a symbiotic relationship with what in order to eat?