Which of the following activities is not a way that unicellular organisms maintain homeostasis?
A. Reproduction
B. Growth
C. Response to the environment
D. Cell specialization
Ans: A. Reproduction
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Seed plants
(a) have alternation of generations. (b) are heterosporous. (c) develop a seed coat. (d) are all of the above.
Industrial melanism involving the peppered moths (Biston sp.) is cited as an example of natural selection that has been observed in the last one hundred years. Recall that the peppered moth exhibits two distinct morphological types with dark and light colored wings. Which of the following statements about changes in these two types of moths as a result of industrial melanism is true?
A. The dark forms are selected against in nonpolluted forests. B. The dark forms are distasteful to birds and are thus safe in polluted forests. C. The light forms are selected against in nonpolluted forests. D. Birds prey more on the dark forms in polluted forests E. Dark forms emigrate from nonpolluted forests to polluted forests.
Members of the genus Thermoactinomyces
A. are commonly found in damp haystacks and compost piles. B. are thermophiles. C. produce spores on its hyphae. D. All of the choices are correct.
Use the table above for the following question(s).
Using the codon table, predict the amino acid sequence that would be produced from the following partial DNA sequence if the top strand is the template strand:3 ’-...ACG TGG ACG TGA TTC TTA...-5’ 5’-...TGC ACC TGC ACT AAG AAT...-3’