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telo118 [61]
3 years ago
8

Why might it be more difficult to prepare a vaccine against noroviruses than against rotaviruses?

Biology
1 answer:
White raven [17]3 years ago
7 0

Designing efficacious norovirus vaccines remains a major challenge due to several factors:

(1) the extreme genetic variability within the norovirus family and within genogroups

(2) the rapid evolution of antigenically dissimilar pandemic GII.4 norovirus strains

(3) the lack of lasting immunity upon natural exposure to noroviruses in at least a proportion of the population.

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Dr. Beadle was one of the first scientists to experiment with crossbreading, and this signifies early advancements in science.

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A, B, C and D

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1. Flower-The biological function of a flower is to affect reproduction, usually by providing a mechanism for the union of sperm with eggs.

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Multicellular

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As for the second question, the frilled lizard is a perfect example of the ways that organs work together to form necessary organ systems. In the instance of the heart, there are cardiac muscle cells that branch and connect to each other to form cardiac muscle tissue, which has special junctions that cause the cells to contract together and in turn keep the heart pumping and the circulatory system moving.

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