Animals living in aquatic habitats have diversified and evolved through time. They eventually occupy ecological niches a..
Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..
Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..
A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..
Meet the colorful takahē, an extremely rare flightless bird. Find out more about its unique features and why they matte..
With regard to the population size of a species and what factors may affect them, two factors have been defined. They ar..