BIOL 1202 : Exam 3
Document Summary
Millions of cells that have gone through programed cell death that are important. In the case of a seed and then germinates. The body of the plant for the majority of its life is diploid and multi cellular. One part of the plant is called totipotent. Rip of a piece and it makes a new plant. At one point plants were aquatic, but then moved to land. Undergo meiosis and turn into haploid cell (megaspore) 3 rounds of mitosis to have 7 haploid cells. The last round of division but cytokinesis doesn"t happen. 2 nuclei in that 7th homokaryotic/dikaryotic cell (n+n) Flowering plants evolved from gymnosperms (earliest seed plants) Insects started carrying pollen grains from male to female plants about 150mya. Plants enticed insects with food in form of pollen (protein rich) and female cones (sugar rich) Angiosperms- flowering plants developed about 130mya i. ii.
