What is fertilization in the process of reproduction? A. The formation of a placenta
B. The joining of an egg and a sperm
C. Sexual intercourse
D. Diploid cell differentiation

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.

Number and variety of living organism; includes genetic, species, and ecological types

People with one sickle cell allele are not likely to get malaria. what is this an example of?