Lines of longitude run perpendicular to the axis of the Earth
Indicate whether the statement is true or false
false
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The electrons of an atom are
A. always in full orbitals. B. always equal to the number of protons. C. used to determine the atomic number. D. carrying a positive charge. E. used to determine the atomic weight.
Which of the following could be a valid scientific hypothesis?
A) Moray eels find their prey primarily by following chemical cues. B) All marine animals must have gills. C) It is immoral to keep dolphins in captivity. D) Dogs are superior in intelligence and swimming capabilities compared to seals.
The only known population of a reptile species lives on an African mountain. The population is relatively large, but no close relatives of this species are known. Suppose you could stop all mutations within the population and all emigration out of this
population. Which statement best describes the probable future of this population? A) The population will decline and become extinct after a few generations because of excessive inbreeding. B) Genetic drift will cause major evolutionary changes in the population. C) Evolution will continue as natural selection acts on the genetic variability that exists in the population. D) Although the population will cease to change, it may survive for as long as the environment remains constant.
As magnification increases what happens to the depth of field(DOF) of the microscope?
a. DOF increases b. DOF decreases c. Nothing d. Magnification is altered