Explanation:
Resistivity, commonly symbolized by the Greek letter rho, ρ, is quantitatively equal to the resistance R of a specimen such as a wire, multiplied by its cross-sectional area A, and divided by its length l; ρ = RA/l. The unit of resistance is the ohm.
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The given statement is true.
Explanation:
Research work needs to be conducted in some particular, well-organized processes. This systematic process aims at gathering ample of information to reach a conclusion by the researcher.
It includes-
(i) identification of a problem to raise a question on that;
(ii) reviewing that problem and learning all about it;
(iii) clarification of the problem is needed which make the scope of study narrow;
(iv) defining the concepts and terms of the research;
(v) studying a particular group which is the objective of the research; (v) The methods and participation is reviewed;
(vi) Collection of data is needed;
(vii) analyzing the data is the last step.
Answer:
C: a coastal region with three ecosystems, each of which supports many different species
Explanation:
Biodiversity means the variety of life in the world or in a particular habitat or ecosystem. So, a costal region with three ecosystem and each has many species would be a biodiversity.
