You have been assigned to analyze some extraterrestrial material recently collected from Mars. After examining a sample using a microscope, you jump up excitedly and shout to your colleagues that you have confirmed the existence of life on Mars. One of your colleagues takes a look at your sample and remarks that all he sees is a single-celled "blob" with little internal structure. Assuming that life on Mars can be classified into similar domains and kingdoms as Earth, to which domain does your "blob" belong?
A. Protista
B. Archaea
C. Fungi
D. Animalia
Answer: B
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What function does the low pH of the stomach serve?
A. It allows for the activation of pepsinogen into pepsin. B. Acidic conditions are less damaging for the cells lining the stomach than basic conditions. C. The acidic conditions break down carbohydrates and other foods directly. D. The acidic conditions neutralize toxic materials that are ingested. E. All the answer options are functions of the low pH of the stomach.
Organisms that typically produce colonies with a fried egg appearance are the
A. Mycoplasma. B. Actinomyces. C. Chlamydia. D. Mycobacteria.
The familiar growth form represented by edible mushrooms, as well as some poisonous mushrooms, is associated with the phylum.
A. Zygomycot B. Ascomycota C. Chytridiomycota D. Basidiomycota E. Glomeromycota
What is the Allee effect?
A. when fitness increases independently of population size B. when fitness and growth rates increase with decreasing population size C. when fitness and growth rates increase with increasing population size D. when growth rates increase independently of population size