When is the earliest time that scientists believe that people may have migrated to the west coast of North America from Asia?
A) 100,000 years ago
B) 41,000 years ago
C) 22,000 years ago
D) 12,000 years ago
Answer: D
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Diamond can cut through quartz. What does this suggest?
A) Quartz is very weak. B) Diamond is very strong. C) Quartz is somewhat weak and diamond is somewhat strong. D) Both are very weak but diamond is only a bit strong.
any alteration in the structure of function of an organism or any of its parts that results from natural selection and by which the organism becomes better fitted to survive and multiply in its environment
What will be an ideal response?
Eutrophication is a condition of natural nutrient enrichment of a shallow lake, estuary or slow-moving stream
Indicate whether the statement is true or false
Based on what you know about how the angle of incidence of the Sun's rays affects temperatures on Earth, determine which of the following statements are correct. Choose all that apply.
A) The Northern Hemisphere receives more direct sunlight than the Southern Hemisphere during January. B) The Southern Hemisphere receives more direct sunlight than the Northern Hemisphere during January. C) The Southern Hemisphere receives more direct sunlight than the Northern Hemisphere during July. D) The Northern Hemisphere receives more direct sunlight than the Southern Hemisphere during July.