常速英语

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Here's the virus particle with its envelope and proteins and genome. And you're going to see this represented as being within a pipette that's going to be dropped onto a petri dish containing human ce...

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So here we are with a view of the cochlea. The cochlea now uncoils, and we look at the basilar membrane, and now you'll see what happens when we play individual tones. Now a chord. And finally somethi...

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We're going to do a head-to-head contest between asexual cloning and sexual reproduction. And I'm going to need-- perhaps you've been wondering what these fruits and vegetables are for up here ...

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RNA is an informational molecule. If one would want a simple analogy for it, you might use the analogy of a video tape. It has a linear array of information, which by itself is typically thought of no...

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So here's our bacterium here and behind it will be these long strands that are the bundle forming pillus. They're going to adhere to the microvilli, these wiener-like structures, this is what's on...

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Adenosine triphosphate, or ATP, is the molecule that powers all life on Earth. Energy from ATP is required for essential activity, including pumping ions across membranes and pulling apart the DNA he...