What is the function of fimbriae?
A.) They are used to transfer DNA during conjugation.
B.) They are used in motility.
C.) They are used to attach the cell to its substrate or to other prokaryotes.
D.) They are components of the outer cell wall in gram-negative bacteria.
E.) They protect the cell from dehydration.
Ans: C.) They are used to attach the cell to its substrate or to other prokaryotes.
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Based on the animal cognition experiments you have learned about, if you wanted to design a test of animal cognition, what might you include in your experiment? (Check all that apply)
_____ Count the number of individuals in a colony. _____ Create a problem for the animal to solve, like getting a treat out of a box. _____ Determine ahead of time what parameters to record as data, such as how long it takes the animal to retrieve the treat. _____ Determine the hormonal basis of caste differences. _____ Expose the animal to the same scenario again later. _____ Focus on careful quantitative analysis of fixed action patterns. _____ Include a negative control. _____ Include multiple subjects. _____ Measure the frequency of response to sign stimuli. _____ Provide tools for the animal to use. 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 animal cognition experiments? 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? Reflection 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?
Which of the following types of chromosomal mutation cannot revert to the wild-type state?
A) Duplication B) Deletion C) Translocation D) Inversion E) Any of these may revert to wild-type
Mycoplasma tuberculosis, the causative agent in tuberculosis, primarily infects the alveolar macrophages and is therefore very fortunate in its size. Why is this statement true?
A) It is just large enough to land in the mucociliary ladder, where type II macrophages phagocytize them. B) It is too small to be caught in the mucociliary ladder and too large to be immediately exhaled, thereby landing it in the alveoli. C) It is just small enough to land in the bronchi, where it is absorbed by alveolar macrophages. D) It is just large enough to land in the respiratory bronchiole, where it migrates to the alveoli. E) It is just small enough to land in the mucociliary ladder, where it is moved to the alveoli to infect macrophages.
A(n) (acidic/metallic/fluorescent) molecule is one that absorbs invisible radiation and emits visible light
What will be an ideal response?