Answer:
Sound travels as waves of energy, but, unlike light, the waves transmit energy by ... You can think of it like a tiny air explosion that travels outward around the thing ... If you drop a marble into a bucket of water, you will be able to see the ripples ... it sounds funny because the water is carrying the sound wave instead of air.
Explanation:
Without genetic variation, a population cannot evolve in response to changing environmental variables and, as a result, may face an increased risk of extinction. For example, if a population is exposed to a new disease, selection will act on genes for resistance to the disease if they exist in the population.
I believe the correct word in the blank would be biological. I don't think anything else will fit in, especially when monomers of biological polymers are truly larger and more complex.
The correct answer is option A, that is, the year was good for growth.
In the regions where the length of the growing season is the restricting element, the thickness of the rings of the tree can suggest that when the growing time was lengthier (at the time of warmer times) and when the growing seasons were shorter (cooler times). The study of the development of the rings of the tree is called dendrochronology.