Which of the following is a valid reason why a scientist might reject a scientific theory 1. some people disagree with it. 2. it’s covers to broad a topic .3. new advance contradicts it it’s too old.

What must happen before meiosis can begin? a. four gametes must be produced b. the four tetrads must be pulled apart c. dna doubles and produces sister chromatids d. the cell membrane pinches together

What is the function of nucleic acids

Number and variety of living organisms includes genetic, species, and ecological types