For innate and adaptive immunity to work together, these two systems must be able to communicate with one another. This communication is achieved by both cell-cell contact and by soluble messengers. Most of these soluble proteins are growth factor–like molecules known by the general name cytokines. Which of these molecule can work as communicator between innate and adaptive immunity?

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#Question id: 5032

#Unit 11. Evolution and Behavior

There is still some controversy among biologists about whether Neanderthals should be placed within the same species as modern humans, or into a separate species of their own. Most DNA sequence data analyzed so far indicate that there was probably little or no gene flow between Neanderthals and Homo sapiens. Which species concept is most applicable in this example?

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#Question id: 659

#Unit 1. Molecules and their Interaction Relevant to Biology

What does it mean to say a protein is oligomeric?

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#Question id: 2290

#Unit 2. Cellular Organization

The cytoskeleton includes all of the following except

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#Question id: 10747

#Unit 10. Ecological Principles

Extinction describes a loss of learning in _____________.

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#Question id: 24168

#General Aptitude

___________________. It rained in April; it rained in May. It rained in the mornings; it rained in the afternoons. It poured, it drizzled, it showered, it misted—but always it rained. But the good news is we won’t have a drought this summer.