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A heterozygous tall pea plant, Tt, is self-fertilised. What are the offspring most likely to be?
a. all tall plants
b. all plants of medium height
c. one tall plant to three short plants
d. three tall plants to one short plant

What do scientific models predict will happen to earth's temperature if current trends continue unmitigated? a. earth will heat and cool in a natural cycle b. earth will heat up and then return to an ice age c. earth will continue to warm at a rate of 0.25 c per decade d. earth will start to cool at a rate of 0.25 c per decade appex