Pollution of the atmosphere; air pollution reduced the visibility.An abiotic Factor, air Pollution is any substance that has a negative effect on living organisms in the environment, such as excessive concentrations of co2 that can result in global warming, thus changing temperature which is a factor in many biological processes.
Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..
Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respo..
Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..
Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..
Topics Modules Quizzes/Worksheets Description Introduction to Genetics Genetics – Definition: Heredity and ..
The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial..