Among the Bacteria, ALL of the following are unique to cyanobacteria EXCEPT

a. oxygenic photosynthesis.
b. photosystem II.
c. chlorophyll.
d. heterocysts.


Answer: B

Biology & Microbiology

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Which layer of the mammalian gut performs peristalsis?

a. mucosa b. muscularis c. serosa d. submucosa e. submucosa and muscularis

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Caenorhabditis elegans is a nematode that scientists have shown grows from a single cell into about 1000 cells, of which the same 80 cells die during development through apoptosis. Studying this process in Caenorhabditis elegans has helped scientists identify the genes that regulate similar processes in humans. Which of the following statements is supported by this observation?

A. Caenorhabditis elegans have all of the same genes as humans. B. Caenorhabditis elegans give live birth like humans. C. Caenorhabditis elegans and humans have a common ancestor. D. Caenorhabditis elegans infections in humans trigger apoptosis. E. Caenorhabditis elegans has the same organs that are present in humans.

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Synapsis is associated with which phase?

A. Meiosis prophase II B. Mitosis prophase C. Meiosis metaphase I D. Meiosis prophase I

Biology & Microbiology

Using the central dogma of molecular biology, explain how an organism's genotype influences its phenotype

What will be an ideal response?

Biology & Microbiology