You drive a nail into a tree that is 10 feet tall so that 5 inches of the nail is showing. You come back 10 years later. The tree is now 30 feet tall and only 3 inches of the nail is showing. This is because secondary growth of the tree is from the
A. root tip.
B. intercalary meristem.
C. apical meristem.
D. lateral meristem.
E. node.
D. lateral meristem.
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The mucociliary blanket is found in the digestive system of mammals.
Answer the following statement true (T) or false (F)
DNA molecules that contain pieces of DNA from two different sources are defined as
A. biotechnology. B. gene cloning. C. recombinant DNA. D. genetic engineering.
Given that humans shifted from hunter-gathers to an agriculturally based society within the last 10,000 years does NOT mean that ________
A) we cannot expect evolution by natural selection in human populations to have kept pace with our changing way of life B) humans still retain many, if not most, of the features that made us well adapted to living in the hunter-gatherer societies of the stone age C) we can use knowledge of the differences between our current lifestyle and the lifestyle of our pre-agricultural lifestyle to better understand both the peculiarities of humans and risks associated with our modern lifestyle D) humans are unique in that we have the capacity evolve by natural selection much more rapidly in response to changes in our environment than other organisms do
A solution has been prepared by mixing glucose in water. Which one of the following statements CORRECTLY describes this solution?
A) Both water and glucose are solutes. B) Both water and glucose are solvents. C) Water is the solute, and glucose is the solvent. D) Water is the solvent, and glucose is the solute.