Escherichia coli bacteria in your colon are best categorized as _______________
A. photoautotrophs
B. chemoheterotrophs
C. photoheterotrophs
D. chemoautotrophs
E. chemolithotrophs
B. chemoheterotrophs
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What type of tissues can be transplanted from one person to another to reconstruct damaged joints?
A) cartilage B) epithelium C) bone D) blood
Which of the following features characterizes diatoms?
a. laminarin and oils as food reserves b. protective plates of cellulose in their cells c. chlorophylls a and c and carotene d. paramylon as a food storage molecule
Which of the following is TRUE with regard to the sliding filament mechanism of muscle contraction?
A) When a muscle fiber is contracting, the thin fibers are connected to the thick fibers. B) The energy for contraction comes from the breakdown of actin into myosin. C) The muscle relaxes when calcium ions are released into the fluid surrounding the thick and thin filaments. D) When actin pushes the Z discs farther apart, the muscle contracts.
What determines which traits will be passed on to the next generation in the greatest frequency?
A) natural selection B) common descent with modification C) acquired characteristics D) mutations