1.4.0 Earliest terrestrial plants

Question 1

according to evolution, how long ago did fern allies appear on land, and what predates them?

Answer 1

Fern allies, but the the lichens were there prior to that

Question 2

What caused the early glaciations of the earth?

Answer 2

colonization of the earth land mass by lichens, dra=awing a lot of the CO2 out of the atmosphere

Question 3

Give two reasons that evolution gives for green algae being the ancestors of terrestrial plants.

Answer 3

1. pigments are ab and carotenoids

2. starch reserves and cellulose walls

Question 4

why are the early ferns considered related to ferns today?

Answer 4

they contain vascular tissue.

Question 5

what are differences between ancient ferns and the ones today?

Answer 5

the male antheridia and the female archegonia

Question 6

what were some of the big chanllenges that plants had to face when they came up on land?

Answer 6

they had to overcome the dry environment, gravity, high UV, no light in soil,

Question 7

Since an ancient cytospore was found in the lands of argentina, what have scientists concluded?

Answer 7

the liverworts were first on land.