In which of the following properties are the Archaea more like eukaryotes than the bacteria?
A) size
B) microtubules and microfilaments
C) translation initiation
D) mode of cell division
E) both choices C and D
C) translation initiation
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Every year a new version of the flu vaccine is made using a mixture of strains. The strains are chosen based on surveillance and analysis by experts from the FDA, WHO, and CDC. For other diseases however, such as varicella (chickenpox), the same vaccine is used continually and repeated vaccinations are not necessary. What do you conclude is the important difference between the influenza virus and the varicella zoster virus with regards to vaccinations?
Different viruses have different properties that affect how the immune system responds to them, and consequently how vaccines must be developed. A. Influenza virus is transmitted through aerosol droplets in the air, while varicella can be transmitted via skin secretions. B. Varicella is attacked by the innate immune system, while influenza is attacked by the acquired immune system. C. Influenza virus has a much higher mutation rate than varicella, leading to frequent antigen changes in the coat proteins. D. Influenza envelope proteins are bound by IgM, while varicella envelope proteins are bound by IgG. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about varicella zoster and influenza? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Answer questions 86–90 in reference to the five divisions of
vascular plants listed below. a. lycophytes b. bryophytes c. monocots d. conifers e. eudicots E 86. In members of this group the gametophyte is the dominant generation. D 87. The giant club mosses of the Carboniferous period were members of this group. M 88. Orchids are members of this group. D 89. Members of this group are heterosporous with welldeveloped seed and pollen-bearing cones. M 90. Members of this group have seeds containing two cotyledons enclosed in an ovary.
Why do some nonnative species spread so quickly and inflict so much devastation when introduced to a new area?
What will be an ideal response?
Which are the three main roles played by organisms in community life?
a. producer, detritivore, decomposer b. consumer, detritivore. decomposer c. producer, consumer, decomposer d. facilitator, decomposer, consumer e. realized niche, fundamental niche, habitat