Guard cell
(Science: plant biology) plant cells occurring in pairs in the epidermis, flanking each stoma. Changes in turgor in the guard cells cause the stoma to open and close.
A pair of cells found on each side of a stomatal opening, which has properties enabling the contraction and expansion of the stomatal pore.
Topics Modules Quizzes/Worksheets Description Introduction to Genetics Genetics – Definition: Heredity and ..
Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..
Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory res..
According to Charles Darwin's theory of natural selection, preferable genes are favored by nature in the gene pool, and ..
This tutorial describes the independent assortment of chromosomes and crossing over as important events in meiosis. Read..
This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..
