An organism benefits from organ systems that work together and communicate, because these systems help an organism to
a. maintain heterogeneity.
b. maintain homeostasis.
C. carry out cell differentiation.
d. carry out complex, specialized functions.

Which would best keep the oxygen cycle stable? a. cutting down jungles to create farmland b. eliminating parks in large cities c. dumping toxic chemicals into the ocean d. reducing the amount of deforestation d. reducing the amount of deforestation

Long term exposure to waves can cause sunburns and skin cancer.

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables