Why are microsporidia so hard to classify?
A. When compared to other eukaryotic organisms, microsporidia are extremely small.
B. They are very rare.
C. They lack nuclei.
D. The intracellular parasitic lifestyle greatly reduces the need for functional organelles.
Answer: D
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The atomic number of an atom refers to its ____
a. mass or weight b. number of protons c. number of protons and neutrons d. number of neutrons e. number of electrons
If you tagged organic carbon inside a chloroplast with a fluorescent label, the location most likely to have a high concentration of labeled carbon would be in the
A. between the outer and inner membranes. B. stroma. C. inside the thylakoid. D. thylakoid membrane.
If the poison is a metal, a(n) ___ test is used to identify which one.
Fill in the blank(s) with the appropriate word(s).
A disaster such as a meltdown in a nuclear power plant requires close examination of potential impacts on organisms. Which of the following would be useful to biologists in such a situation?
A) Use a molecular clock to time the divergence of species in an area from those far away. B) Measure continental drift to determine if the disaster had accelerated movement of continents. C) Use radiometric dating to determine if new species are forming. D) Examine the mutation rate of species in the area.