Question

7. How have angiosperms coevolve with pollinators to enhance the fitness of both partners? Consider factors such as flower morphology, trait matching, etc.

8. How does secondary growth happen? Be specific and detailed; name all tissue layers. Then explain how tree rings are used to determine the age of a tree.

Bonus (6 pts): What is an evolutionary tradeoff? Provide an example of an evolutionary tradeoff in plants.

Answer 1

Sorry, but I can only answer one question due to answering guidelines. You have to post the questions seperately.

Ans 7. The angiosperms have coevolved with the pollinators to enhance fitness of both partners and to ensure the increased chances of pollination. Some have become so much dependent on each other, that they cannot survive or exist without each other. The angiosperms provide various rewards like pollen, nectar, safe place to lay eggs, fruits, etc to different types of pollinators. If one species like plant or the pollinator acquire some changes, other has to change accordingly in order to ensure its survival. Flowering plants have adapted certain features like bright colored flowers, scented flowers, and chemical or tactile agents which mimics female insects, to attract male species for the purpose of pollination. Some flowering plants are coevolved that only their partner pollinator can pollinate them and no one else.