The area where the two chromatid halves of a chromosome are joined is called a
A. centrosome
B. metaphase plate
C. centromere
D. mitotic spindle

Which of the following would involve looking at different structures of organisms and comparing how similar they are? a. vestigial structuresb. radiometric datingc. homologous structures

Select the correct answer. which of the following statements is a scientific claim? a. the early solar system had large amounts of water; so, the oldest objects in the solar system should also be abundant in water. b. the mass of the universe is much greater than current models predict; it is not possible to explain this inconsistency. c. planet earth is abundant in water, but there is no way to scientifically determine from where earth's water originated. d. earth is shaped like a sphere even if not all of the scientific observations related to its shape support this idea.

Why does competiton happen? a: different organisms have different needsb: there are limited resources in an ecosystemc: there are no predators in an ecosystemd: organisms do not need the same resources (i think it's b but i'm not sure)