The strongest evidence for the endosymbiotic origin of eukaryotic organelles is the similarity between extant prokaryotes and which of the following?
A) nuclei and chloroplasts
B) mitochondria and chloroplasts
C) cilia and mitochondria
D) mitochondria and nuclei
E) mitochondria and cilia
Ans: B) mitochondria and chloroplasts
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If two solutions have unequal concentrations of a solute, the solution with the lower concentration is called
A. isotonic. B. hypertonic. C. hypotonic. D. osmosis.
Even though estuaries support large numbers of organisms, there are relatively few numbers of species that live in estuaries. Why is this the case?
What will be an ideal response?
Which statement is true?
a. The ratio of carbon dioxide produced to oxygen consumed is greater than one in healthy adults. b. The partial pressure of oxygen in the lungs is greatest just before exhalation. c. The partial pressure of carbon dioxide is greatest in venous blood. d. Partial pressures are the measurement of Hg displacement in the lungs.
Adipose tissue cells are filled with
a. minerals. b. fat. c. cartilage. d. fibers. e. muscles.