Seedless vascular plants evolved which of the following features of modern plants?
A)seeds only
B)roots only
C)leaves only
D)secondary growth only
E)roots, leaves, and secondary growth
E
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Which of the following substances is particularly abundant in volcanoes that have the most impact on global climate?
A. carbon dioxide B. nitrogen C. sulphur D. water vapour
In which of the following locations do lenticular clouds typically form?
A. downwind of a mountain range B. upwind of a mountain range C. far away from a mountain range D. about 10 km above a mountain range
A population of bats evolves because organisms from a separate bat population move into the population. This mechanism of evolution is known as
A. natural selection. B. mutation pressure. C. genetic drift. D. gene flow.
What is a gene? Why are so many of an organism's traits determined by its genes?
What will be an ideal response?