BIO 351 - FINAL EXAM QUESTIONS WITH CORRECT ANSWERS| LATEST UPDATE GUARANTEED SUCCESS

BIO 351 - FINAL EXAM QUESTIONS WITH CORRECT ANSWERS| LATEST UPDATE
GUARANTEED SUCCESS



Anthophyta (Angiosperms or Flowering Plants) • 275,000 species

• about 300 families

• Creaceous (fossil record); possibly back into the Triassic and Permian (not proven)

• Origin of the ovary

- Carpel

- Gynoecium

- Pistil

- Placenta

• Cleft plugged with hairs

• Carpel has mid vein




Anthophyta - Reproduction (Male) • Pollen grain

- Generative cell

- Tube cell

- No prothallial cells




Anthophyta - Reproduction (Female) • Ovary

- Ovule

, - Integuments

- Micropyle

- Embryo sac

- - Synergids

- - Antipodals

- - Egg

- - Polar nuclei

- Embryo

- Endosperm

- Seed




Amborella • Basal angiosperm (most basic angiosperm)

• Tall shrub

• Restricted to New Caledonia

• Dieocius

• Seed with a lot of endosperm & small embryo

• Many simple pistils (not fused)




Anthophyta and Amborella - Development of Gametophytes Haploid microspores develop
from microsporocytes in the anthers and give rise to pollen grains containing two cells: the tube
cell and the generative cell. At about the time of pollination, the latter cell divides and produces
two sperm. This three-celled pollen grain is the immature male gametophyte
(microgametophyte).