_______ are the primary sources of most antibiotics.
A) Bacteria and viruses
B) Viruses and protistans
C) Protistans and fungi
D) Fungi and bacteria
Ans: D) Fungi and bacteria
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Which of the following statements about asexual reproduction is TRUE?
a. The offspring are genetically identical to each other. b. The offspring are genetically identical to their parent. c. It is common in vertebrates. d. The offspring are genetically identical to each other and to their parent. e. The offspring are clones of each other but not clones of their parent.
In which model of evolution are many transitional forms predicted?
A. gradualistic B. punctuated equilibrium C. Neither punctuated equilibrium nor gradualistic. D. Both punctuated equilibrium and gradualistic.
A researcher suspects that the food in an ecosystem has been contaminated with radioactive phosphates over a period of months. Which of the following substances could be examined for radioactive phosphate to test the hypothesis?
A) the DNA of the organisms in the area B) the amino acids within proteins produced by organisms living in the area C) the starch produced by plants in the area D) All of the above are true.
Fungal spores
A. cannot be seen in a light microscope. B. are produced by molds but not by yeasts. C. are only asexually produced. D. are only produced under harmful environmental conditions. E. are used to identify fungi.