4. which of the following statements is not correct?
a. an organ is made up of many tissues to perform a similar function.
b. a community is a collection of all the populations in an area.
c. atoms are made up of many living cells
d. an ecosystem comprises of all biotic and abiotic factors in an area

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome

Which of the following is a good definition for the word adaptation? question 1 options: a trait that an organism survive and reproduce in its environment. a change in an organism's environment. the way in which animals obtain food. a temperature change that can cause the extinction of plants and animals.

They live on every continent except antarctica