Why is DNA replication called simi conservative

The kind of fertilization found in the majority of aquatic animals is (internal or external) fertilization.

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 ?

Crossing over and independent assortment are important activities that occur during meiosis. what is the significance of these activities