Coal is made from the remains of dead plants. it is made of carbon and other elements. is coal a mineral? a, yes, because it is formed naturally.
b. yes, because it contains carbon.
c. no, because it is created artificially.
d. no, because it is an organic substance.

How is mitosis different in plants and animals? a. in animals, the cell membrane pinches together. b. in plants,the dna is one circular chromosomes. c. in plants, there are no sister chromatids. d. in animals, a new cell wall forms.

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