While in the biology lab, you observe, in both plant and animal cells, that some single cells are splitting into two daughter cells. You also observe that the splitting cells are still connected by a contractile ring and the cytoplasm has started to divide. You conclude these cells are undergoing

A. metaphase.
B. mitosis.
C. cytokinesis.
D. anaphase.
E. binary fission.


C. cytokinesis.

Biology & Microbiology

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Which of the following statements about mammalian cleavage is false?

A. The embryo increases in overall size during cleavage. B. It occurs more slowly than cleavage in other organisms. C. Early divisions do not occur at the same time. D. Zygotic transcription begins as early as the two-cell stage. E. Cell divisions extend completely through the egg.

Biology & Microbiology

Chromatin consists of ____

a. only DNA b. DNA and RNA c. RNA only d. DNA and associated proteins e. proteins only in the nucleus

Biology & Microbiology

The modified amino acid f-Met is essential for

A. bacterial translation. B. bacterial transcription. C. eukaryotic transcription. D. eukaryotic translation. E. eukaryotic mRNA processing.

Biology & Microbiology

Which of the following is not a characteristic of the Neandertals?

A. They are considered H. sapiens. B. The brain size was larger than ours. C. They were heavily muscled. D. They had massive brow ridges. E. The pubic bone was long compared to ours.

Biology & Microbiology