A key step in the evolution of vascular plants was the ability to produce ____, a strengthening polymer in the walls of
cells that function for support and conduction
a. cutin
b. chitin
c. lignin
d. actin
e. cellulose
c
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Psilotum lacks
a. roots. b. a mechanism to take up water and minerals. c. vascular tissue. d. alternation of generations.
Richard is an avid gardener who spends a lot of time caring for the plants in his garden. To minimize damage from pests from his garden, Richard uses a pesticide spray. At first the spray is very effective and kills off most of the insects that he sees on his vegetable plants. However, after a few years of using the same pesticide he notices that some insects are surviving and continuing to eat his plants. The ability of some of the insects to survive pesticide spraying would be considered
What will be an ideal response?
Scientists use Italian when constructing scientific names.
Answer the following statement true (T) or false (F)
The oldest fossils of eukaryotes have been estimated to be
A. 6000 years old. B. 8 billion years old. C. 4.5 billion years old. D. 1.5 billion years old. E. 1995 years old.