Has varied greatly over time
The second stage of prenatal development begins at about two weeks after conception. at this point, the growing bundle of cells is called an embryo.
Answer:
Carbon Cycle: the series of processes by which carbon compounds are interconverted in the environment, involving the incorporation of carbon dioxide into living tissue by photosynthesis and its return to the atmosphere through respiration, the decay of dead organisms, and the burning of fossil fuels.
Explanation:
Answer:
returns to the left heart, completing the pulmonary cycle
Explanation:
Answer:
B it lives inside or on a host
Explanation:
that is the definition of parasite
