In today’s pattern of extinction, the generation of new species is unlikely because a. most plant species are being destroyed b. entire ecosystems are being destroyed c. alien species occupy important niches d. key animal species are being destroyed

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