In an eight-cell embryo of an organism, the cells of the upper tier are aligned directly over the cells of the lower tier. Which organism is it likely to be?

What are two specialized structures of an apple tree that increase the chances that it will reproduce and have offspring that survive?

Gentoo penguins will present a mate with a pebble that they find to attract a mate. Emperor penguins have a specific call and movement that they make to attract a mate. Which type of isolation do these penguins demonstrate? A.) temporal isolation B.

What are 3 adaptations that frogs have that make them amphilbians

Breathing through the nose rather than the mouth is advantageous because

give three examples of a stimulus and a possible response in humans

Because plant-like protists make their own food from sunlight, in what kind of environment would they not be able to survive? Why?

Where is the respiratory electron transport chain in prokaryotes?

A specific molecule was separated from a yeast cell and then placed in a flask to find out if it would bind to another molecule. This type of experimental design is called a (n) A. in vitro observation B. occupational cohort study C.

If one is experiencing difficulty sleeping, like with insomnia, he or she may go to their family doctor. What type of drug is the doctor most likely to prescribe to assist the person in falling asleep?

As you examine a soil sample under your microscope, you note the presence of tiny, worm-like organisms. You immediately suspect that these creatures are nematodes.