German biologist Willi Hennig (1913–1976):
a. established the modern approach to classification.
b. documented evolutionary history in his book Phylogenetic Systematics.
c. noted that phylogenetic trees can help us to classify organisms according to their evolutionary history.
d. All of the above.
D
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You come across an article on alien nucleic acid structure. The article states that researchers have discovered a new single-ring nucleotide. Based on your knowledge of nucleic acids here on Earth, which of the following characteristics might apply to this new nucleotide? Select all that apply.A) The new nucleotide is probably a purine.B) The new nucleotide is probably a pyramidine.C) The new nucleotide may be similar to cytosine.D) The new nucleotide may be similar to guanine.E) The new nucleotide may be similar to uracil.
What will be an ideal response?
If you placed a red blood cell in a solution that contains less solute than the cell, you would predict that its volume would ________ while the solute concentration in its cytoplasm would ________.
A. decrease; decrease B. increase; increase C. decrease; not change D. decrease; increase E. increase; decrease
If the population age structure of a country resembles a pyramid, with the pre-reproductive age group the largest proportion of the population, and the post-reproductive age group the smallest, this country can most likely be classified as one of the
A) stable populations. B) least developed countries. C) most developed countries. D) steady-state populations. E) expanding populations.
Which of the following is not one of the four main groups of biomolecules?
A) electrolytes B) nucleic acids C) carbohydrates D) proteins E) lipids