Vinegar is a good cleaning solution because it is a weak acid, while ammonia is a good cleaner
because it is a weak base.
Indicate whether the statement is true or false.
T
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Botulinum toxin, or "botox", has become popular for cosmetic surgery. The toxin prevents neurosecretory vesicles from docking at the plasma membrane and releasing neurotransmitter. How would this toxin affect the neuromuscular junction?
A. Since ACh is not released, the muscles stay in a state of repeated contraction. B. Since ACh is not released, the muscles are not activated to contract and remain relaxed. C. Buildup of ACh causes promiscuous activation of all nearby sensory neurons. D. Buildup of ACh leaks back into the brain, creating a calming effect. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content/Choose Answer · What do you already know about the botulism? What other information is related to the question? 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?
Homologous chromosomes have the:a
same length but differing genes. b. same shape but differing genes c. the same genes but differing shapes. d. same genes but differing lengths
e. same length, shape, and genes.Imagine that every person on Earth had an ecological footprint the size of an average Haitian person's ecological footprint. Which of the following is a potential result?
a. we would quickly run out of renewable and nonrenewable resources because we would have to use even more fossil fuel to support our energy demands b. we would exceed the biocapacity of Earth c. it would take the equivalent of about four Earths to support all of us d. our effect on Earth's resources would be at a much more sustainable level than it is currently e. a, b, and c are all potential results
Which of the following is characteristic of ciliates?
A) They use pseudopods as feeding structures. B) They are often multinucleate. C) They can exchange genetic material with other ciliates by the process of mitosis. D) Most live as solitary autotrophs in fresh water.