Conservation is concerned with applying scientific knowledge to prevent the loss of biodiversity. Which of the following human activities is least likely to threaten biodiversity?
A) organic farming
B) habitat destruction
C) overexploitation
D) introduced species
Answer: A) organic farming
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You are in a lab studying a new cell type that has been discovered. You observe a rigid cytoskeleton in this cell, along with a nucleus and a compartmentalized interior. How would you classify this cell?
A. as an advanced prokaryotic cell, because it has a rigid cytoskeleton B. as a primitive prokaryotic cell C. as a possible transitional cell from prokaryotic to eukaryotic D. as a eukaryotic cell that has to be heterotrophic E. None of the answers options is correct.
Members of the class _______ are worm-like mollusks that lack a shell and have aragonite spicules on their skin.
a. Monoplacophora b. Aplacophora c. Scaphopoda d. Polyplacophora
The brain and spinal cord are formed from the
A) notochord, which is formed from mesoderm. B) notochord, which is formed from endoderm. C) neural tube, which is formed from mesoderm. D) neural tube, which is formed from ectoderm.
A person comes into the clinic with a wound that is severely inflamed, very painful, and turning black and "bubbly." The diagnosis is leprosy
Indicate whether the statement is true or false