Stream gradient is constant along the course of a river
Indicate whether the statement is true or false
False
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Cobalt-60 is a radioactive isotope sometimes used in the treatment of cancer. Which of the following statements is true about an atom of cobalt-60?
A) It contains 27 neutrons. B) It contains 27 protons. C) It contains 60 neutrons. D) It contains 60 protons.
A black walnut (Juglans nigra) emits a chemical that may kill or inhibit the growth of other nearby shrubs or trees without harming itself. This is an example of which symbiotic relationship?
A) Parasitism B) Mutualism C) Commensalism D) Amensalism
Use the laws of conservation of matter and energy to describe the consumption of fuel by a car. That is, what are the inputs and outputs of matter and energy? (Note: Gasoline is a mixture of organic compounds containing carbon-hydrogen bonds.)
What will be an ideal response?
Coral reefs contain about ________ as much algal biomass as animal biomass
A) four times B) half C) one fourth D) three times E) twice