Change in chromosome structure in which a particular segment is present more than once in the same chromosome.
What will be an ideal response?
duplications
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Most enzymes
A. are generic, typically recognizing a number of different substrates. B. are specific, typically recognizing a single or a few substrates. C. are active over a wide pH range. D. are active over a wide temperature range. E. are generic, typically recognizing a number of different substrates AND are active over a wide pH range.
Which of the following can be found in a plant cell, but not an animal cell?
a. mitochondria b. nucleus c. chloroplast d. Golgi body
Industrial melanism involving the peppered moths (Biston sp.) is cited as an example of natural selection that has been observed in the last 100 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. Birds prey more on the dark forms in polluted forests B. The dark forms are distasteful to birds and are thus safe in polluted forests. C. Dark forms emigrate from nonpolluted forests to polluted forests. D. The light forms are selected against in nonpolluted forests. E. The dark forms are selected against in nonpolluted forests.
Which of the following scientists provided evidence in favor of the concept of spontaneous generation?
A. Pasteur B. Needham C. Redi D. Buchner E. Spallanzani