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Trichomes _____.

Which of the following is unique to animals?

Which of these structure-function pairs is incorrect?

The first cavity formed during sea urchin development is the

Changes in both cell shape and cell position occur extensively during

During most daily activities, the human respiration rate is most closely linked to the blood levels of

What happens to a retinal photoreceptor when it captures a photon?

Which of the following cells are NOT found in the retina?

Central coordination of vertebrate biological rhythms in physiology and behavior reside in the

Neurons communicate with each other at electrical synapses by means of