According to the Doppler Effect, an object traveling away from the observer is ?

purple-shifted

green-shifted

blue-shifted

red-shifted

Compare and contrast nutrient limitation in soil vs. nutrient limitation in aquatic ecosystems

Transmission electron microscope are best for viewing a) microorganisms in pond water b) internal organs of a mouse c)internal structures of a cell d) surface features of a specimen

Types of scientific inquiry that biologist engage in that cannot be completely controlled