Which statement best describes the movement of carbon dioxide into or out of a plant during photosynthesis?
A. It is given off into the soil.
B. It is taken in from the soil.
C. It is given off into the air.
D. It is taken in from the air.

Which feature of a human community is similar to a niche in a biological community

Using meiosis, the sporophyte produces spores that are .

Once an egg cell is fertilized by sperm, the cell then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its mother's blood. a. becomes a fetus immediately and exits the womb b. begins to divide and implants itself in the wall of the uterus c. remains in the uterus without dividing for several months d. travels back to the ovaries until the fetus is developed