Which of the following characterizes Gram-positive bacteria?
a. the presence of an outer membrane
b. the absence of ribosomes
c. the presence of a thick cell wall
d. the absence of a cell wall
Ans: c. the presence of a thick cell wall
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What do the two daughter cells generated by the first asymmetric division of the plant zygote become?
A. the suspensor and the embryo B. the epicotyl and the hypocotyl C. the root and the shoot D. the egg and pollen E. the xylem and the phloem
Describe the difference between anagenesis and cladogenesis
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Burning fossil fuels releases carbon dioxide into the atmosphere. This additional carbon dioxide is causing a phenomenon called global warming. Which process "put" the carbon into our fossil fuels? Explain the process
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If you put 20g of food in 180ml of sterile water and blend, what dilution factor does this represent?
A) 1:10 B) 1:100 C) 1:1000 D) This is not a dilution.