The zygote of an organism has 10 pairs of homologous chromosomes. The total number of chromosomes in the germ cell of the organism is . (enter numeric answer below)

Consider darwin's first writings on the theory of natural selection. an important point of darwin's essay on the principle of population, written in 1798, was a peer's observation that in nature plants and animals produce far more offspring than can survive, this observation can be attributed to a) charles lyell. b) thomas malthus. c) jean-baptiste lamarck. d) johann friedrich meckel.

How many major plates cover the earth

How does the carbon cycle involve an exchange of carbon