Scientific knowledge has, in some cases, led to a. decreased life expectancy b. a decrease in the gap between developed and developing countries c. a better quality of life d. all of the above

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

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 ?

Which is abiotic? a. tree sap b. insect c. sunlight d. wood table