Apart from vitamins, the human body also requires high energy sources such as carbohydrates and fats. If you want an ove..
With regard to the population size of a species and what factors may affect them, two factors have been defined. They ar..
Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..
Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..
Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..
This tutorial deals with the structure and function of flowers, fruits, and seeds. Also included here are the types of f..
