All virus particles (virions) have a
A. A genome surrounded by proteins
B. Ribosomes and nuclei
C. A genome surrounded by cytoplasm but no organelles
D. Nuclei and mitochondria
E. Golgi and a genome
Ans: A. A genome surrounded by proteins
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What are the five stages of a typical infectious disease? During which stage is the host likely to infect others?
What will be an ideal response?
All of the varied sensations we experience are due to which three categories of sensory receptors?
A. visioceptor, audioceptor, olfactoceptor B. exteroceptor, interoceptor, proprioceptor C. mechanoreceptor, chemoreceptor, electromagnetic receptor D. mechanoreceptor, olfactory receptor, photoreceptor E. mechanoreceptor, chemoreceptor, nociceptor
The extremely flexible tissue that provides support in soft, nonwoody plants and allows them to grow upward is:
a. parenchyma tissue. b. collenchyma tissue. c. sclerenchyma tissue. d. dermal tissue. e. meristematic tissue.
According to the graph, at what maternal age is the incidence of Down syndrome equal to five times the incidence at age 40?
A) about 29 or 30
B) about 35 or 36
C) about 44 or 45
D) about 46 or 47