Which one of the following is a vestigial structure?

A. liver

B. heart

C. right leg

D. appendix

What causes the volcanic activity in the mid atlantic ridge A. Magma, or hot rock, being forced up within the mantel B. Hurricanes C. Earthquakes D. Tsunamis E. Tornadoes

With what characteristic is shared by birds salamanders and sharks

Which describes a group of organs that work together to perform a common function? tissue organism organ system cell

Can jellyfish live on land?

Is a superficial fungal infection found on the head. Tinea cruris Tinea capitis Tinea pedis Tinea corporis

Which of the following is an excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle? A) gamma aminobutyric acid B) acetylcholine C) cholinesterase D) norepinephrine

How does gas like oxygen get across the cell membrane?

Why are there so few aquatic plants and phytoplankton that live at the bottom zones in the ocean? a. the ocean floor contains many de composers b. most sunlight is absorbed before reaching these levels c. water is limiting factor d.

Which of the following is not a property of a base? Feels slippery to the touch Changes red litmus to blue Has a sour taste Produces OH - ions

Two cats are mated. one of the parents cats is long haired (recessive allele). The litter which results contains two short haired amd three lomg haired kittens. What does the secon parent look like, and what is its genotype?