Biomagnification involves compounds having higher relative concentrations in ________.
A. lower trophic levels
B. top consumers or higher trophic levels
C. higher trophic levels
D. top consumers
Answer: B
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If the decolorizer is left on too long in the Gram-staining procedure, gram-positive organisms will be stained ________ and gram-negative organisms will be stained ________.
A. purple; colorless B. purple; blue C. purple; pink D. pink; pink
What is the second step of a muscle contraction?
What will be an ideal response?
Which of the following is a membranous organelle that chemically modifies and ships proteins to other organelles or out of the cell?
A) lysosome B) chloroplast C) mitochondria D) Golgi complex
During the mid 1930s, G. F. Gause studied competition among three species of Paramecium. Through his experiments, he formulated a principle of
A. interspecific competition. B. metapopulation fluctuation. C. niche overlap. D. exploitative competition. E. competitive exclusion.