Which situation is a result of crossing-over during meiosis? A. Genes are rearranged, increasing the genetic variability of offspring.

B. Chromatids thicken and align themselves, helping to ensure genetic continuity.

C. Genes are duplicated exactly, ensuring that offspring will be identical to the parents.

D. Chromatids fail to sort independently, creating abnormal chromosome numbers.

Which experiment would most likely contain experimental bias ?

Zoo geographic regions are characterized by the presence of specific groups of animals these regions are determined by the taxonomic or phylogenetic relationships of animals. the map shows the zoogeographic regions proposed by the naturalist alfred russel wallace in 1876. the similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between the organisms in both locations ?

Match the reproductive structures based on their function and the system to which they belong. egg ovary sperm vas deferens vagina fallopian tube testis urethra