What characteristic did the earliest fish have?
A)armored plated skin
B)jaws
C)spiny skin
D)plated skin
E)ray-fins
A
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What is the most important aspect of Mendel's genetic studies?
A)Chance is the most critical factor in change. B)Genes controlling traits do not blend during inheritance but are transmitted as discrete entities. C)The traits which an organism inherits are the average of the end member alleles. D)If particular traits do not appear within two generations, they are lost from the species. E)Traits are controlled by single genes.
The Peru Chile Trench is an example of ________ plate boundary
A) a continental-continental convergent B) a continental-continental divergent C) an oceanic-continental convergent D) an oceanic-oceanic convergent E) an oceanic-oceanic divergent
Explain where and how plastic accumulates in the open ocean. What will be an ideal response?
Which type of sewage treatment is properly matched with its process?
A. primary - biological process B. secondary - mechanical process C. advanced - physical and chemical processes D. secondary - chemical process E. primary - chemical process