Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

tina-ann

  • 2 years ago

Discuss the order in which seed dispersal mechanisms could have evolved. Which do you think was most effective in which era and which is most effective today? Give reasons for your hypothesis.

  • This Question is Closed
  1. Sleepy12
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    In the evolution of plants the first plants that lived on land needed to be by the water. Their 'seeds' were spores that needed to swim through a film of water in order for fertilization to occur. These were primitive plants such as mosses and ferns and they are limited in where they can grow since they need to be in moist environments. The next important type of plant was the gymnosperm. Their seed dispersal mechanism is pollen which is transported by the wind so water was no longer needed. Gymnosperm means naked seed so their seeds were not surrounded by a fleshy fruit, just a hard seed coat which protected the embryo. Therefore they were not attractive to animals. Finally, the most successful plants are the Angiosperms, the flowering plants, which are the majority of the plants around today. Their pollen is dispersed by wind and well as insect pollinators who are attracted to the flowers. Once the seed is fertilized it develops a fleshy fruit which attracts animals to eat it. Once the animals eat the fruit they poop out the seed. Therefore the seed can be dispersed farther distances by animals. When the animals poop out the seed this essentially proves fertilizer for the seed and the possibly the right conditions for germination.

  2. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.