Examlex
Simple random sampling can result in under-representation or over-representation of certain segments of the population.This is one of several reasons that simple random samples are almost never used in real applications.
Ethologists
Scientists who study the behavior of animals in their natural environment to understand universal and species-specific behaviors.
Biologists
Scientists who study living organisms and their interactions with each other and their environments.
Ventricles
Cavities within the brain that produce and contain cerebrospinal fluid, important for protecting and nourishing the brain.
Meninges
The three layers of protective tissue called the dura mater, arachnoid mater, and pia mater that encase the brain and spinal cord.
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