An antigen-bearing pathogen that breaches normal flora surface barriers triggers __________ immunity. Fill in the blank(s) with the appropriate word(s)
ANSWER: innate
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Select the pairs of organism characteristics that are homologous structures. Check all that apply.
_____ cactus spines; tree leaves _____ human hand bones; whale fin bones _____ bat wing; butterfly wing _____ octopus eye; mouse eye
How are retroviruses and retrotransposons similar? Describe the genes encoded by the DNA of the retrovirus and the two DNA elements consistently found in retrotransposons
What will be an ideal response?
Some organisms are capable of asexual or sexual reproduction. Under favorable conditions, reproduction proceeds asexually. When conditions become more stressful, reproduction switches to a sexual mode. Why?
A) Sexual reproduction produces individuals with new combinations of recombined chromosomes increasing diversity. B) Sexual reproduction is simple and more rapid, allowing larger numbers of offspring to be produced. C) Asexual reproduction requires more energy. D) Sexual reproduction requires two separate individuals who can mutually provide nutrient support during stress.
Drug cocktails for the treatment of HIV infection include which of the following?
A) Reverse transcriptase inhibitors B) Protease inhibitors C) Fusion inhibitors D) All of the above