BISC 366 Study Guide - Quiz Guide: Double Fertilization, Storage Protein, Mitosis

• School: Simon Fraser University
• Department: Biological Sciences
• Course: BISC 366
• Professor: Alison Kermode

Document Summary

Quiz 1 revision five processes that occur during seed maturation (the seed expansion stage) that are important for the survival and longevity of seeds. 1 - accumulation of food reserves - allows seedling to survive before beginning photosynthesis and autotrophic growth. 2 - hardening of protective layers of seed coat. Seed coat needed for mechanical support/structural protection, abiotic interactions, biotic interactions, chemical defense, protection, prevention of loss 3 - mechanisms for dispersal develop (ie, seed morphology) To withstand water loss, resistance to pathogens/insects/herbivores etc. 5 - development of dormancy in some species. Delay germination to distribute in time and space, require a signal to break dormancy, based on environmental conditions, may reduce offspring competition. Why is it called dual fertilization? main steps in fertilization: 1 - pollen grain germinates after landing on stigma of correct spp. 2 - tissues of style allow pollen tubes to grow through them easily.