What are the challenges to plants that their algal ancestors didn't have to face? What are the challenges to plants that their algal ancestors did not have to face?

Expert Answers

An illustration of the letter 'A' in a speech bubbles

Drying out: plants need to conserve water since they live on land.

Gas exchange: a different means of exchanging oxygen and  carbon dioxide that diffusion across a membrane had to be evolved

Support: Water supported the weight of the algae, plants have evolved a cellulose structure of cell wall to support their weight.

Reproduction: gametes released into the water could mix and mingle swimming with flagella until they meet causing fertilization to occur. On land, reproduction had to evolve to include wind, animals, and other means of getting the male gametes to meet the female gametes.

There are more, please follow the links below for more details. These are the biggest obstacles to life on land that a plant will face.


Approved by eNotes Editorial Team

We’ll help your grades soar

Start your 48-hour free trial and unlock all the summaries, Q&A, and analyses you need to get better grades now.

  • 30,000+ book summaries
  • 20% study tools discount
  • Ad-free content
  • PDF downloads
  • 300,000+ answers
  • 5-star customer support
Start your 48-Hour Free Trial