All ________ have two very different types of nuclei within their cells, small micronuclei and larger macronuclei.
A. dinoflagellates
B. sporozoans
C. ciliates
D. oomycetes
E. protists
Answer: C
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Early microscopes did not allow clear visualization of cells because they were limited by
A) magnification. B) number of kernels. C) resolution. D) refraction. E) both choices A and C
Which of the following is a protective layer of cell envelope?
A. Pilus B. Glycocalyx C. Ribosome D. Fimbria E. Nucleoid
Lyell's theory of uniformity is the idea that ________
a. None of these answers b. rapid, sudden changes have changed the Earth c. gradual, repetitive changes have shaped the Earth d. lines of descent improve each generation as a result of internal drive by the organism e. catastrophic geological events have shaped the Earth
A study of a cohort of 1,000 newborn animals showed a death rate of 40% per individual in year one and a death rate
of 80% per individual in year two. The quantity of survivors after two years is about ____.
a. 120 b. 200 c. 320 d. 400 e. 1,000