The Earth is the only planet known to support life. Which of the following is a major contributing factor to the Earth's ability to support life? A. The Earth is surrounded by a layer of air that includes oxygen.
B. The Earth has a magnetic field with north and south poles.
C. The Earth orbits the Sun and is orbited by the Moon.
D. The Earth has an iron-rich core and is made mostly of rock.

Danielle has blonde hair. her mother has blonde hair and her father has brown hair. which explains how danielle inherited her hair color? she inherited a chromosome that carry alleles for hair color from someone other than her mother and father. she inherited a chromosome that carries an allele for hair color from only her father. she inherited a chromosome that carries an allele for hair color from only her mother. she inherited a chromosome that carries an allele for hair color from each parent.

How do oceanographers measure the salinity of ocean water?

17. the soil erosion pictured here is the result of what? a. harvesting renewable resources at a rate greater than the sustainable yield b. a mudslide caused by excessive rains c. harvesting renewable resources at a rate lower than the sustainable yield d. the transition between geologic eras and eons