Refer to the accompanying figure. The component labeled as B is:
a. DNase.
b. DNA polymerase.
c. RNA primase.
d. RNA polymerase.
e. reverse transcriptase.
d
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The cell wall component algin is
(a) found in the brown algae. (b) used in the production of ice cream. (c) used as a medium on which microorganisms are grown. (d) both a and b.
True or False: Rats can learn to make any kind of association if repeated for a sufficient length of time
A. true B. false
Before biologists discovered the role of DNA and chromosomes, Gregor Mendel, a scientific researcher, studied the genetics of pea plants related to flower colors, pea colors, pea pod shapes, and other features of the plant. He numerically modeled the results he observed and published results, which eventually led to our basic understanding of how biological traits are passed to new generations of organisms. His work, however, was largely rejected for over 30 years, partly for minor record-keeping errors, and partly for the new approach of defining reproduction of organisms in terms of numerical probabilities. This demonstrates that
A. only the most recent scientific investigations on a topic are useful in understanding biological conditions or processes. B. Gregor Mendel's work wasn't valid until researchers later identified chromosomes and their role in reproduction. C. a unique, new way to propose a theory discredits the research until someone else proves findings to be true. D. the color and shape of peas was not important to the scientific community. E. scientific evidence is harder to accept because of cultural biases and misunderstandings on the topic.
The structures labeled "B" in the accompanying figure ____
a. prevent movement of materials between cells b. are found in tissues subjected to stretching c. allow the free passage of materials between cells d. are found mostly in heart muscle e. are found in most tissues except in the stomach