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Compound microscopes have more than one lens to generate high magnification images of flat, thin specimens. There are three major structural parts of a microscope: Head, Base, and Arm. ... The light is then collected and formed an image by an objective lens. We see the magnified images through the eyepiece
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(AZT) was the first antiretroviral drug used in HIV and AIDS. It is expensive and has several adverse effects including nausea, vomiting, blood problems and myopathy. The review of trials found that AZT does delay the early progression of HIV disease, but this improvement is not sustained. AZT alone does not increase survival for people without AIDS.
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Yes, caffeine does provide following benefits to plants:
1) Caffeine provide benefit to the plant in a way by enhancement of pollination process. This occurs by preferential pollination of such flowers whose nectar contain a small quantity of caffeine.
2) Caffeine that is present in leaves and seeds is a way that kills insects thus protecting them from damage.
3) Caffeine increases the learning ability of bees. Bees sucking nectar, having even a low concentration of caffeine showed a long term memory.
These include materials with the oldest DNA evidence of human<span> habitation in North America. The DNA, </span>radiocarbon<span> dated to 14,300 years ago, was found in fossilized </span>human coprolites<span> uncovered in the </span>Paisley Five Mile Point Caves<span> in south-central Oregon.
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Maintaining constant water and salt concentration (osmoregulation), keeping a constant temperature of the body and excreting waste substances.
