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Q. How does the contraceptive diaphragm work? What are the limitations of this contraceptive method?
The contraceptive diaphragm is an artifact made of plastic or latex that when placed on the vaginal fundus covers the uterine cervix forbidding the passage of sperm cells through the cervical canal. To be further effectual the diaphragm needs to be used together with spermicide. This process though doesn't prevent sexually transmitted diseases (STDs).
What is the spontaneous generation hypothesis? The impulsive generation abiogenesis or hypothesys asserts that life on earth has come from nonliving material. For instance, t
How might the destruction of large areas of tropical rain forest have world-wide consequences? As plants consume CO 2 during photosynthesis, extensive deforestation could resu
Show History of Quantitative Impacts on Biology Quantitative threads have been woven into the fabric of biology since at least the late 19th century, when Malthus warned of the
Different types of stems (a) Monocots. Secure stems of various plants such as bamboo, sugar cane and corn. Cut every of the stems crosswise with a very sharp knife or razor bl
How to Calculate the Biological Value of Protein? A method for determining the biological value of proteins was developed by Mitchell in 1925. It measures the quantity of dieta
Define Descending type of paper chromatography? In descending chromatography, the movement or flow of mobile phase is in downward direction. In this technique the solvent is ke
The use and transfer of energy in all cells involves same compound, ATP. The letters ATP stand for chemical: a) Adenosine triphosphate b) Aluminum trioxide c) Atrophine t
Effects of Cardiogenic Pulmonary Edema Interference with oxygen transfer in the lungs Depression arterial oxygen tension Sense of suffocation and oppression in the
Contrast the reproduction of bacteria with that of frogs. Bacteria replicate asexually by splitting in two. Frogs reproduce sexually by producing sperm and eggs. One sperm and
SPERM A T OGENESIS The process of maturation of reproductive cells in the testes of male to form spermatozoa (sperm) is known as spermatogenesis. The testes are formed
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