The 2nd and 4th answer choices sound the best to me. I personally would go for the 2nd one, explaining that the fossils of fish K and fish R and Y are similar. If you get the question wrong, I am VERY sorry. :(
An isotonic solution is when two solutions, separated by a semipermeable membrane, have equal concentrations of solutes and water. Imagine you're at a party and there are an equal number of guests in the living room and in the kitchen. It doesn't make much of a difference where you stand because you are equally as comfortable in either room. You have just as much space, you can move just as easily, and you have equal access to food. You don't spend a lot of energy trying to get out of one room or into another. This party is like an isotonic solution; everything is equal from room to room.
Answer: water, carbon and nitrogen
Explanation:
All of the materials an organism takes in are returned to the ecosystem, while the organism lives or after it dies. The movement of matter through the living and nonliving parts of an ecosystem is a continuous process, a cycle. ... Three of the most important cycles in ecosystems involve water, carbon, and nitrogen.
Because it makes it to where you can’t communicate as easily thus impacting social development