Which of the following groups makes up a system? a. cell membrane, nucleus, cytoplasm
b. stomach, eyes, ears
c. heart, blood vessels, capillaries
d. food molecules, mouth, stomach

Which of the following is the most likely result of converting forestland to urban development? a.the amount of land available for lumber production decreases. b.fewer trees are needed because cities are made mainly of concrete. c.people discover more efficient ways to grow trees. d. the price of lumber goes down.

The tubes transporting minerals and water upward are called ?

The spermists believed that: the male made the only hereditary contribution to the offspring the male and female traits were blended in the offspring the female made the only hereditary contribution to the offspring the male and the female made equal contributions to the next generation