Ablind fish from a true-breeding line in one cave was crossed to a blind fish from a true-breeding line in another cave. the mutations that cause blindness are in two different genes. you cross the f1 fish and examine 1600 progeny. approximately how many will be blind.

Which of the following is true of microbes? a. ninety-nine percent of all microbes are pathogenic.b. gene expression in bacteria is very similar to gene expression in humans, which facilitates the use of bacteria in recombinant biotechnology and gene therapy.c. all bacterial enzymes are harmful to humans and the environment.d. microbes create pollutants and toxins that harm the environment.

According to the cell theory, which describes cells? a. all organisms are composed of multiple cells. b. all cells have the same structure and function. c. cells are found in everything on earth. d. living organisms are not created spontaneously

Darwin’s hypothesis about how life changes over time is now called?