In contrast to viruses and bacteria, neurotoxins:
A) can only enter the body through the inhalation route.
B) are characterized by a slow, insidious onset of symptoms.
C) are not contagious, but do have a faster onset of symptoms.
D) have been used successfully as a weapon of mass destruction.
Answer: C) are not contagious, but do have a faster onset of symptoms.
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Manta rays, sting rays, and eagle rays are similar to lampreys in that they have cartilaginous skeletons. How are they different from lampreys?
A. They have closed circulatory systems. B. They have gills. C. They have jaws. D. They have bony fin lobes. 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 the evolution of the jaw? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
The two nuclei in the dikaryotic state are:
a. diploid and from the same parent b. diploid and from different parents c. haploid and from the same parent d. haploid and from different parents e. one diploid and one haploid from different parents
Which of the following is(are) NOT trend(s) of
vertebrate evolution? a. conversion of the support for locomotion from the notochord to the vertebral column b. expansion of the nerve cord to form the brain and spinal cord c. changes in the respiratory system from gills to lungs with accompanying changes in the circulatory system d. the development of fewer, more efficient chambers in the heart e. modification of limbs that allowed for more efficient movement
The five groups of archaea are:
a. Psychrophilic, carcinogenic, halophilic, high- and low-pH tolerant, and high-pressure tolerant b. Anaerobic, aerobic, thermophilic, high- and low-pH tolerant, and methanogenic c. thermophilic, halophilic, high- and low-pH tolerant, high-pressure tolerant, and methanogenic d. Anaerobic, aerobic, thermophilic, high-pressure tolerant, and hydrophilic e. Archaea are not divided into groups; they are a specific group of their own.