ALL of the following organisms have been responsible for acid mine drainage EXCEPT
a. Acidithiobacillus ferrooxidans.
b. Ferroplasma.
c. Leptospirillum ferrooxidans.
d. Thermoplasma.
Answer: D
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Some botanists consider the stoneworts to be a link between the higher plants and the algae. As you will learn in future exercises, higher plants, such as the mosses, have both haploid and diploid stages that are multicellular.
(a) Describe the multicellular organism in the charophytes. (b) Is this organism haploid or diploid? (c) Is the zygote haploid or diploid? (d) Is the zygote unicellular or multicellular?
Sexual reproduction in algae utilizes meiosis that results in the production of
A. spores with twice as much DNA as the parental cells. B. gametes with half the amount of DNA as in the parental cells. C. spores with the same amount of DNA as the parental cells. D. swarming cells with the same amount of DNA as the parental cells.
The protein located in muscle cells that delivers oxygen directly to the mitochondria is
A. Hemoglobin B. Myoglobin C. Thyroxin D. Phytic acid
Ecosystems in the United States experience seasonality because:
A) there is a predictable seasonal solar activity cycle. B) the rotation of Earth causes a rhythmic circulation of Earth's atmosphere. C) Earth is closer to the sun in summer and farther away in winter. D) Earth is tilted with respect to the orbit around the sun. E) Earth rotates on it's axis relative to the sun.