Biology, 08.03.2021 20:30 twistedhyperboles
Which of these is an example of passive immunity?
a) a person develops antibodies to fight off an ear infection
b) antibodies are passed from a pregnant woman to an infant through breast milk
c) a person develops antibodies against the measles vaccine
d) a person is vaccinated for hepatitis B
Answers: 1
Biology, 21.06.2019 20:00
With the description of the different cell walls, membranes, and associated proteins set in the students' minds, you now need to introduce them to the idea that the cell wall can also act as a foundation to build things upon. bacterial appendages require a strong foundation that will offer the support needed to move and function in a dynamic world. for example, flagella are long, whiplike protein structures that are used by many gram-positive and gram-negative bacteria for locomotion. in order to function effectively, a flagellum must be firmly anchored to the cell wall. how will you be able to get across the idea that the peptidoglycan cell wall is strong enough to support such a mechanism? with a protein rod that passes through the cell wall and protein rings used to anchor it in the membranes, these basal bodies are the rudimentary biological motors that use atp power to spin the hook and the flagella attached to it. bacterial flagella have a biological motor that spins within the cell wall and is powered by atp. this allows the flagella to spin in a whiplike motion to propel the bacterium.
Answers: 3
Biology, 22.06.2019 02:00
The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important
Answers: 3
Biology, 22.06.2019 19:30
The wind speed in the region between cities a and b was probably the greatest at noon on which day
Answers: 1
Which of these is an example of passive immunity?
a) a person develops antibodies to fight off an e...
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