If without oxygen, people can die, then what can people die without? Answer choices: - water - h2o - family - retina - love - oxygen - friends - food
oxygen
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If receptor cells perceives light that enters the pupil, then what is used to perceieve light inside the pupil? Answer choices: - an electron lens - It expands - Receptor Cells - heat energy - Energy. - focusing a lens - sensory neurons - observe it
Receptor Cells
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If an organism's fitness is a result of evolution, then what is one of the facets of an organism's evolution? Answer choices: - resistance - fitness - properties - thirst - movement - swimming - offspring - recycling
fitness
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If dogs conserve body heat with their fur, then how do dogs conserve body heat? Answer choices: - their blood cells - fur and fat - their nails - layers of fat - Exfoliation - sweating - their fur - their hair
their fur
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