How do whales, bats, and dolphins use echolocation.
a. to scare away predators
b. to orient themselves and to find food
c. to attract mates
d. to tell other animals of their species where they are

The part of a desired plant inserted into rootstock during grafting is called the

The term equestrian relates to which animal? bulls cows horses pigs

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