Are humans responsible for neurotoxic shellfish poisoning? What will be an ideal response?
Indirectly, yes we are. Dinoflagellates will, under specific conditions, experience ‘algal blooms’ -
explosive growths in population. One of the primary factors contributing to this is the availability of
nutrients which can be greatly increased by agricultural runoff (human input). When the
dinoflagellates are present in great numbers, filter-feeding shellfish consume them in great quantity
and absorb their toxins. These toxins then cause neurotoxic shellfish poisoning in human consumers.
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Hershey and Chase demonstrated that when the bacteriophage T2 infected its host cell, the ________ is injected into the host but the ________ remained outside.
Fill in the blank(s) with the appropriate word(s).
In Drosophila melanogaster, the gene for eye color is located on the X chromosome. The allele for red eye color
(Xw+) is dominant over the allele for white eye color (Xw). You examine a vial of 100 flies that are all offspring from a single genetic cross. You find only red-eyed females and red-eyed males present. Flies from the vial were allowed to interbreed, and in the next generation you find only red-eyed females, but you find both red-eyed and white-eyed males. The genotypes of the original parents were ____.
a. Xw+Xw+; XwY b. Xw+Xw; XwY c. XwXw; Xw+Y d. Xw+Xw; Xw+Y e. XwXw; XwY
Which duct in the male reproductive system will function in both reproduction and urination?
a. Ejaculatory b. Vas deferens c. Seminal vesicle d. Epididymis e. Urethra
When adding Barritt's reagent to your MRVP broth, you see a red color change. This means that acetoin was produced of glucose metabolism.
a. true b. false