How has the male gametophyte evolved in these four phyla Bryophyta, Pteridophyta, Coniferophyta, and Magnoliophyta? In which phyla do the male and female gamete-producing structures occur on the same gametophyte? Which phyla require water for the sperm to reach the egg? In which phyla do the gametophytes depend upon the sporophytes? And finally, how do the changes in the male gametophyte relate to the great leaps forward” in plant evolution?

Fan egg cell containing the (n+1) number of chromosomes combines with a sperm cell containing the (n) number of chromosomes, what is the result of this union? a) all future somatic cells of the organism will contain the (2n + 1) number of chromosomes. b) all future somatic cells of the organism will contain the (2n - 1) number of chromosomes. c) only certain somatic cells of the organism will contain the (2n + 1) number of chromosomes. d) all future somatic cells of the organism will contain the normal diploid number of chromosomes.

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

1. watermelon, papaya, oranges, bananas, and lemons are included in this food group. vitamin c 2. you need 6 or more servings of this food group each day vitamins d and a 3. found in fruit and keeps blood vessels healthy calcium 4. vitamins found in milk bread and grain 5. a mineral that strengthens bones fruit