Seeds And Survival Flashcards

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1
Q

Give 8 reasons why evolutionary development of seeds had resulted in the success of angiosperms.

A
  • dormant seeds have low metabolic rates so survive cold
  • testa is chemically resistant so survives adverse conditions
  • water content low so survives dry conditions
  • testa physically protects the embryo
  • endosperm/cotyledons provide nutrients until the seedling can photosynthesis
  • seeds dispersed great distances so don’t compete
  • seed dispersal allows colonisation of new habitats
  • inhibitors only allow germination at certain times of year.
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2
Q

What is vernalisation?

A

When seeds are broken down in very cold weather so the seed can germinate in spring.

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