Trace elements are those required by an organism in only minute quantities. Which of the following is a trace element that is required by humans and other vertebrates, but not by other organisms such as bacteria or plants?

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#Question id: 5073

#5. Developmental Biology

The emergence of the polarity of an embryo is the result of:

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#Question id: 5036

#5. Developmental Biology

 The experiments of Spemann and Mangold first defined what feature of amphibian embryos?

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#Question id: 1422

#4. Cell Communication and Cell Signaling

In cells that have been signaled to die via TNF-a receptor signaling but lack caspase-8 activity:

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#Question id: 12591

#10. Ecological Principles

A community's actual evapotranspiration is a reflection of

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#Question id: 10336

#6. System Physiology – Plant

methemoglobinemia, a disease, What will cause inside the human body?