Biology, 19.03.2021 09:50 Poohbear6583
B. Population Dynamics Symbiotic Relationships
Ticks
Ticks belong to a family called Acarina, which also contains mites. Ticks eat by taking blood from
other organisms such as wallabies, lizards, echidnas and occasionally humans. In humans this can
lead to symptoms such as itching, head aches and in extreme cases flu like symptoms, facial
paralysis, and meat allergy.
1. Identify the relationship a tick has with its host. Justify your answer [3]
Answers: 3
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The seed coat's most important function is to provide a) a nonstressful environment for the megasporangium. b) the means for dispersal. c) dormancy. d) a nutrient supply for the embryo. e) desiccation resistance.
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Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?
Answers: 1
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Drag the tiles to the boxes to form correct pairs. match the causes with their effects cause: tectonic plates at transform boundaries experience friction. cause: tectonic plates at transform boundaries experience friction. cause: earth is covered by a crust that runs miles deep.
Answers: 1
B. Population Dynamics Symbiotic Relationships
Ticks
Ticks belong to a family called Acarina,...
Ticks belong to a family called Acarina,...
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