"The Tree of Life" task

DAVID ATTENBOROUGH   “The Tree Of Life”

Answer the questions 1-5. If possible, use the words below in your answers.

1.      What are the characteristics of these groups of organisms: algae, sponges, insects, fish, amphibians, reptiles, birds, mammals?

2.      How are these organisms related in the process of evolution?

3.      How can the process of evolution explain the following: the birds’ wings, amphibians’ legs, birds’ feathers, skulls and backbones?

4.      What happened on earth

a) 450 mln years ago?

b) 375 mln years ago?

c) 65 mln?

5.   Why did mammals manage to dominate the Earth?

a molecule

a cell

to replicate

to diversify

a descendant

to stiffen

an internal rod

segments

hard protective skin

rigid(ity)

to  venture

meanwhile

to gulp air

fleshy

scaly skin,

to exterminate

vacant

insulated