Which best describes probability? a. the likelihood that something will happen b. the genotype ratio for a certain trait c. the most likely possible outcome d. the number of offspring with a tr

Explain why phospholipid molecules form a bilayer. (3 marks)

Why does meiosis produce cells with half the chromosomes? o a. most of the chromosomes are not necessary to keep an organism alive. b. a gamete needs only half the number of chromosomes because two gametes join together. o c. it makes the gametes easier to move around in the organism. o d. it is faster to produce gametes with fewer chromosomes.

Which is an important function of normal flora? a. aid with bone marrow production. b. crowd out pathogenic bacteria. c. destroy digestive track pathogens. d. manufacture iron in the bloodstream.