Which symbol is used to label a male that expresses a sex-linked disorder on a pedigree? An empty circle. A half-filled circle. An empty square. A filled square.

Which conditions are necessary for natural selection to occur? select all of the answers that apply. a. inheritable adaptations vary among individuals. b. the population size is increasing. c. more individuals are born than can survive. d. fitness varies among individuals. e. the environment changes suddenly and drastically.

What happens when water’s salinity increases? mass decreases. freezing point decreases. buoyancy of objects decreases. the amount of dissolved minerals decreases.

What is the one part of the nucleotide  that differs among the other different nucle  tides?