Explain the difference between plasmogamy and karyogamy

What will be an ideal response?


Plasmogamy is the fusion of two cells so they share a common cytoplasm but keep the two original
nuclei separate. It results in a cell that has two distinct nuclei, also called a dikaryon, with ploidy of n +
n. Karyogamy is the fusion of the two nuclei; when this occurs, the cell ceases being an n + n dikaryon
and instead becomes a true 2n diploid cell.

Biology & Microbiology

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A protein called actin consists of 376 amino acids. The mRNA for actin must be longer than

A. 125 nucleotides. B. 376 nucleotides. C. 1128 nucleotides D. 3384 nucleotides.

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Which of the following is most likely the cause of the current extinction crisis?

a. asteroid impact b. human activity c. adaptive radiation d. tectonic activity e. rising sea levels

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Endospores can be inactivated by

A. incineration. B. dry heat at 170°C for 2 hours. C. glutaraldehyde for 3 or more hours. D. ethylene oxide for 3 or more hours. E. All of the choices are correct.

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Peptide and protein hormones are polar molecules that ____.

A. inhibit the effect of nonpolar hormones B. alter the effect of certain genes C. bind to a receptor at the cell membrane D. move directly across the cell membrane and enter the nucleus E. form ATP

Biology & Microbiology