Instructions

Explain, from a cellular point of view, how it is possible to determine the age of a tree. 2. a. Conifers are the dominant vegetation in the taiga, a biome characterized by long winters. Given the environmental conditions, why are these trees evergreens? b. Given the environmental conditions of the taiga and the evergreen nature of he conifers, why do pine needles have xerophytic characteristics?
3. a. Describe the characteristics of the xerophytic leaf that cause it to be well adapted to life in a dry environment b. Describe the characteristics of the pine needle that cause it to be well adapted to life in a dry environment.
c. Describe the characteristics of the hydrophytic leaf that cause it to be well adapted to life in a wet environment.

4. The thallus of the livewort is not considered a true leaf. a. How does the thallus of liverwort differ from the leaf of a higher plant? b. How do the pores of liverwort differ from the stomates of higher plants?
c. How do the rhizoids of liverwort differ from the roots of higher plants

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