Which type of organelle or structure is primarily involved in the synthesis of oils, phospholipids, and steroids?
A) ribosome
B) lysosome
C) smooth endoplasmic reticulum
D) mitochondrion
E) contractile vacuole
Answer: C
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Following the Deepwater Horizon accident in the Gulf of Mexico in 2010, bioremediation was used to eliminate much of the oil from the contaminated water. To encourage the growth of oil-degrading microbes, "fertilizer" including iron and nitrogen was added to the water. Which of the following statements regarding the growth of these microbes is incorrect?
A. The oil-degrading microbes used oil (hydrocarbons) as their carbon source. B. The concentration of sulfate in the Gulf of Mexico is sufficient for the growth of oil-degrading microbes. C. Large amounts of iron were needed, as iron is a macronutrient for oil-degrading microbes. D. Nitrogen gas (N2) present in air is not in a form that can be used by oil-degrading microbes.
You discover a fungus that makes mainly asexual spores, but that occasionally makes sexual spores
When produced, the sexual spores come out of a thickened, hardened structure. A close examination of hyphae of this fungus reveals no septa. Into which group should you classify this fungus?
a. Glomeromycota b. Basidiomycota c. Chytridiomycota d. Zygomycota e. Ascomycota
When examining a mutant mouse, you notice that its skeletal muscle looks very uniform, lacking in striations. To figure out what the mutation is in this mouse, you would begin by looking at
A. sarcomere organization. B. the retention of calcium in the endoplasmic reticulum. C. tendons. D. the blood vessels in the muscles. E. the sheath around muscles.
If the members of a population are small in size, mature early, and have high parity and fecundity, they are
A. r-strategists. B. K-strategists. C. neither K-strategists nor r-strategists, but have characteristics of both.