Emergence of a new species is known as _______.
A. adaptive radiation
B. inbreeding
C. reproductive isolation
D. speciation
E. coevolution
Answer: D
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Extrachromasomal DNA is found in ____________________________
A. mitochondria B. plasmids C. nucleoid D. nucleoli E. mitochondria AND plasmids
Which types of cells in the human body do not repair themselves if they have been damaged?
a. Skin b. Bone c. Blood d. Hair e. Nerve
The concept of an ecosystem differs from that
of a community in that, unlike the community, the ecosystem includes the a. producers. b. decomposers. c. physical environmental factors. d. animals as well as the plants. e. parasites.
In this model, it is often difficult to determine when exactly speciation occurred due to many __________ links between species over time.
What will be an ideal response?