How is carbon reintroduced into the atmosphere? A) decomposition
B) photosynthesis
C) evaporation
D) transpiration
E) all of the above

How does an angiosperm prevent self pollination

Select the correct answer from each drop-down menu. in an experiment, dr. travis examined the effects of calcium intake on osteoporosis, a condition that causes an increased risk of bone fractures. the amount of calcium is variable. the risk of bone fractures .

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm