Following which event has evolution happened?
a. an allele frequency in a population changes over time.
b. a new predator comes into an environment.
c. an individual is born with six fingers on one hand instead of five.
d. an animals white coat is replaced by a darker coat in the spring.

Which type of bond forms between water moleculesstrong bondhydrogen bondcovalent bondpolar bond

Complete the statements to identify the first two steps of meiosis i. (1 ) the first and longest step of meiosis i is called i. (2)the second step of meiosis i is called i.

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.