Tara goes to the beach during the summertime. one morning she wades into the ocean before the sun has risen and notices that the water in the ocean feels warmer than the sand on the beach. in the afternoon of the same day, she wades back into the ocean and observes that now the water in the ocean feels cooler than the sand on the beach. which of the following best explains the difference in temperature between the ocean and the sand? a. water heats up at a slower rate than land, but cools down at a faster rate. b. water both heats up and cools down at a slower rate than land. c. water heats up at a faster rate than land, but cools down at a slower rate. d. water both heats up and cools down at a faster rate

Researchers want to use edna to look for an invasive species in the water which of the steps would be likely do last

To answer this question, researchers studied populations of the dusky salamander (desmognathus ochrophaeus) living on different mountain ranges in the southern appalachian mountains. the researchers tested the reproductive isolation of pairs of salamander populations by leaving one male and one female together and later checking the females for the presence of sperm. four mating combinations were tested for each pair of populations (a and b)—two within the same population (female a with male a and female b with male b) and two between populations (female a with male b and female b with male a). the proportion of successful matings for each mating combination was measured. for example, when all the matings of a particular combination were successful, the researchers gave it a value of 1; when none of the matings were successful, they gave it a value of 0. then the researchers calculated an index of reproductive isolation that ranged from 0 (no isolation) to 2 (full isolation). the reproductive isolation value for two populations is the sum of the proportion of successful matings of each type within populations (aa + bb) minus the sum of the proportion of successful matings of each type between populations (ab + ba). the table provides data for the geographic distances and reproductive isolation values for 27 pairs of dusky salamander populations.

Why is the theory of evolution important? it disproves all other theories about how life began. it provides a topic for debate. it is a unifying concept in biology. it explains how life began. i know for sure, it is not "it is a unifying concept in biology."