Which of the following are true? O There is variation in populations

•There is competition for resources within a population and not all organisms will survive to reproduce

•When organisms reproduce they pass their DNA to their offspring

•All of the above are true

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.

Which of the following forest management practices is best for reestablishing areas of forest?

Follow the directions for self-quiz question 8, draw it, by labeling the appropriate structures with these terms, drawing lines or brackets as needed: chromosome (label as replicated or unreplicated), centromere, kinetochore, sister chromatids, nonsister chromatids, homologous pair, homologs, chiasma, sister chromatid, cohesion