A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..
Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..
Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..
Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..
This study guide tackles plant roots in greater detail. It delves into the development of plant roots, the root structur..
Plants are characterized by having alternation of generations in their life cycles. This tutorial is a review of plant m..
