Why is a water molecule polar? a. it has an unequal number of electrons and protons. b. the oxygen atom attracts electrons more strongly than the hydrogen atoms do. c. the hydrogen atoms attract electrons more strongly than the oxygen atom does. d. the molecule spins around an imaginary pole, similar to a planet.

How are the reproductive cycles of a fungus and a pteridophyte similar? a)both organisms form fruiting bodies that produce diploid seeds. b)both organisms produce haploid spores and exhibit diploid and haploid stages. c)both organisms reproduce sexually when two haploid hyphae fuse. d)both organisms exhibit a diploid stage and are only able to reproduce asexually.

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.

Which of the following is a feature of all cells? o a. all cells have a nucleus. o b. all cells have dna for at least part of their life cycle. het . o c. all cells are spheres. o d. all cells have a rigid cell wall.