Answer:
I think it's
A <u>mass </u>extinction occurs when many species go extinct in a relatively short period of time.
Explanation:
Mass extinction is usually defined as a loss of about three-quarters of all species in existence across the entire Earth over a “short” geological period of time. Hence, I think the answer is correct.
Answer:
Humans have many cells. Bacteria have one cell. The second point is that cells are the basic unit of structure and function in humans and bacteria. The third point is that new human and new bacterial cells come only from other human and bacterial cells.
Explanation:
C. In radiometric dating, scientists place samples of a fossil in certain liquids until the samples dissolve. The rate at which they dissolve indicates the age of the fossil.
Answer:
most likely b, a population is many living with each other and not just one species
Answer:
E. Calorie intake equals calorie output
Explanation:
according to the law of thermodynamics, energy can neither be created nor destroyed. thus every energy taken in must be accounted for.
We convert potential energy that’s stored within our food (measured in Calories or kcals) into three major “destinations”: work, heat and storage.
conclusively, energy intake must equal energy output.
