topic 7: Plant transitions

Question 1

brophytes

Answer 1

non-vasuclar plants

Question 2

Pteriodophytes group

Answer 2

a group of seedless vascular plants

Question 3

gymnosperms group

Answer 3

a group of seed plants that are vascular but do not have flowers

Question 4

angiosperms group

Answer 4

a group of flowering plants that are vascular

Question 5

which is the main plant of evolution

Answer 5

it was believed that all land plant evolved from charophytes

Question 6

What were the challenges that plants faced transitioning onto land from the aquatic setting

Answer 6

• they need more solid structures since they had they have to face gravity
• they needed to develop more specialized structure to allow for nutrient uptake and distribution (needed to develop roots systems and vascular tissue)
• needed to develop a way to minimize water loss and conserve water (developed a waterproof covering)
• needed to develop a method a way or reproduction that was not water reliant

Question 7

What were the benefits of plants transitioning to the land

Answer 7

• the plants have easier access to carbon dioxide
• gases also diffuse at a lot faster rate on land then they do in the water
• initially, moving to the land minimized the amount of competition along the species

Question 8

what are the main charactersitics of the bryophytes

Answer 8

• they are usually found in wet environments
• they do not have vascular tissues
  -they do not have a waterproof coating
• they have no true organs but has leaf-like structures
• all of the three subgroup found in this species goes through alternation of generations with a dominant gametophyte