Place the following organisms in order of appearance in the fossil record, beginning with the earliest
A. ferns, algae, flowering plants, gymnosperms
B. amphibians, reptiles, fish, mammals What will be an ideal response?
A) algae,ferns,gymnosperms
B) fish, amphibians,reptiles, mammals
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Currents in the ocean basins of the Northern Hemisphere always run in what direction?
A. counterclockwise B. clockwise C. north to south D. from the equator to the poles E. from the poles to the tropics
When a species lives in suitable habitats throughout a geographical area they have
1.disjunct distributions. 2.continuous distributions. 3.a dispersal. 4.a vicariance. 5.None of the options is correct.
You are viewing a blood vessel under the microscope. You see three distinct layers, one of which is a thick muscular layer. The layers are separated by extensive elastic tissue. This vessel is most likely a(n)
A) capillary B) arteriole C) vein D) artery
Phototropism
What will be an ideal response?