Iron is required for primary production. Which of the following is correct to predict?
a. Iron fertilization of oceans can raise N2 in the atmosphere.
b. Iron fertilization of oceans can lower O2 in the atmosphere.
c. Iron fertilization of oceans can raise CO2 in the atmosphere.
d. Iron fertilization of oceans can lower CO2 in the atmosphere.
Ans: d. Iron fertilization of oceans can lower CO2 in the atmosphere.
You might also like to view...
Which statement about the differentiation of the three primary germ layers is not correct?
A. Ectoderm gives rise to epithelial cells, pigment cells of skin, and nerve cells in the brain. B. Mesoderm gives rise to cells that make up the inner layer of skin, muscle cells, and red blood cells. C. Endoderm gives rise to cells lining the digestive tract and lungs, as well as liver and pancreas. D. Ectoderm gives rise to cells lining the digestive tract and lungs, as well as liver and pancreas. E. Germ layers are sheets of cells that will differentiate into specialized cells.
Darwin calculated that if reproduction was not limited, a single pair of elephants could leave ____
descendants after 750 years.
a. 750 b. 15,000 c. 150,000 d. 19 million e. 190 million
Easter Island ________
a. was discovered by Charles Darwin in 1650 b. had a thriving human community in 1440 c. is a paradise today d. has a habitat that was destroyed by overpopulation of white-tailed deer
Any cell can present an antigen on a class I major histocompatibility complex (MHC) protein.
a. true b. false