The atrioventricular valve is: a) is a flap in the heart located between each atrium ventricle b) are thin like hair-like blood vessels that attach arteriole to venules c) is a membranous tube that carries blood to the heart

List two modern organisms that have pentameral symmetry

You can tell from this karyotype that the individual is female because the karyotype has two chromosomes labeled

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