Which of the following membranes can give rise to a viral envelope?
A) the nuclear membrane
B) the cytoplasmic membrane
C) the endoplasmic reticulum
D) the nuclear and cytoplasmic membranes
E) the nuclear and cytoplasmic membranes and the endoplasmic reticulum
E
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The lipopolysaccharide (LPS) layer is found ONLY in the cell walls of
A) gram-positive Bacteria. B) gram-negative Bacteria. C) Archaea. D) Eukarya.
If the cilia on Bob's inner ear hair cells are damaged, what can be done to improve Bob’s hearing, other than a hearing aid?
Hair cells are delicate sensors of sound, movement, and gravity. Since they are stimulated by movement of the stereocilia and kinocilium, these structures are vulnerable to damage when stimulus is too strong or sustained. A. transgenic expression of a cilia protein B. minoxidil treatment C. injection of microtubules into the cochlea D. not much – there is currently no drug that can regenerate hair cells
Type I survivorship curves
a. are characteristics of humans and elephants. b. typify a population in which all ages have an equal chance of survival. c. indicate a high mortality rate in the very young. d. show that very few young are produced, that each is given parental support, and that most individuals live a relatively long life and die of old age. e. are typical of annual plants
Which of the following describes the function of the simple cup-shaped eyes found in flatworms?
A. They can see structures. B. They can see color. C. They have depth perception. D. They can detect light and shadows. E. They have lenses that regulate the amount of light.