Explanation:
Respiration..
the act of respiring; inhalation and exhalation of air; breathing. Biology. the sum total of the physical and chemical processes in an organism by which oxygen is conveyed to tissues and cells, and the oxidation products, carbon dioxide and water, are given off.
Genetic variation can<span> be </span>caused<span> by </span>mutation<span> (which </span>can<span> create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).</span>
Answer:
Harmful effects of microorganisms:
Bacteria: Causes various diseases such as typhoid, diarrhea, and cholera.
Fungi: Causes a large number of diseases in plants and in animals such as rust diseases in plants, fruit rot in apple, red rot in sugar cane and ring worm disease in human beings.
Answer:
Energy comes to the earth surface in the form of sunlight. When the sunlight strikes the earth surface, some energy is absorbed by the earth through vegetation in the process of photosynthesis, while more are reflected back into the space but these light radiation trapped by greenhouse gases such as carbondioxide, methane and nitrous oxide etc which increases the temperature and causes global warming which changes our climate.
