I'm not entirely sure what you mean, but a fit animal is one that is able to out-compete with other animals in its ecosystem. It possesses some kind of advantage, which makes it easier to compete with others for food, water, shelter, and mates. Due to these qualities, the animal is obviously able to live for a good deal of time and have a greater chance of producing viable offspring.
The fibrous skeleton of the heart
functions in all of the ways listed in the option, except causing direct spread
of electrical impulses from the atria to the ventricles. The fibrous skeleton
in fact supports proper coordination of atrial and ventricular contractions by
blocking direct spread of electrical impulses from atria to ventricles.
Answer:
The theory of Continental Drift suggest that hundreds of years ago all the continents were one big continent called Pangea. Soon these contintents split up created the places that we live today. This theory was introduced by Alfred Wegener. His colleges thought he was crazy, but later studies proved his impossible theory to be true. By the process of "sea floor spreading" the continents were then ripped apart and drifted to where they are today.
Your answer is going to be A pairs with T via 3 hydrogen bonds and C pairs with G via 2 hydrogen bonds.
An easy way to remember this is that the curvy letters (C and G) bond with each other and the straight letters (A and T) bond with each other. That never changes.
I hope I was able to help. Best of luck!
