Which of the following is part of the theory about the Earth's magnetic field?

A. It has to do with the rocks on the surface on the Earth
B. The theory states that the north and south poles have more iron and nickel than other places on Earth
C. The theory states that the magnetic field is created by molten iron and nickel circulating in the Earth's core
D. The theory states that the magnetic field is created by man

How do plants obtain more sunlight a.) they lean towards the light b.)they grow straight up c.) they only live in sunny areas, like the tropics d.) they stay low to the ground

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

Which of the following types of reactions would decrease the entropy within a cell? a. dehydration reaction, b. hydrolysis, c. respiration, d. digestion, e. catabolism.