Biology MCQs

Notes:
The total mass of a human body is made up of six key elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. These “bioelements” make up over 99% of the body mass. Oxygen is the most plentiful, accounting for about 65% of a human’s body mass. Carbon and hydrogen follow, then nitrogen, calcium, and phosphorus.

Notes:
Cloves are aromatic dried flower buds of a tree. Cloves are native to Indonesia and used as a spice in cuisines all over the world. Cloves are now harvested primarily in Indonesia, Madagascar, Zanzibar, Pakistan, and Sri Lanka; they are also grown in India under the name Lavang.

Notes:
The building blocks of the human body are cells. Cells are the smallest unit of life and they perform all the functions necessary for the body to function. There are many different types of cells in the body, including muscle cells, nerve cells, and blood cells. These cells are organized into tissues, which are groups of similar cells that work together to perform a specific function. Tissues are then organized into organs, which are structures made up of multiple tissues that work together to perform a specific function, such as the heart or the liver. Organs are then organized into systems, which are groups of organs that work together to perform a specific function, such as the respiratory system or the circulatory system. Together, these building blocks allow the body to function as a whole.

Notes:
Ornithophily refers to the pollination through birds. Birds which are involved in ornithophily are specialist nectarivores with brushy tongues and long bills, that are either capable of hovering flight or light enough to perch on the flower structures.

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A tablet of Vitamin C should be advised to be used after purification of water by Iodine as a disinfectant. The addition of vitamin C usually in the form of a pill or in flavored drink powders, precipitates much of the iodine out of the solution.

Notes:
In humans, fertilization normally occurs in the fallopian tube. The ovary is the female gonad that contains the eggs. The uterus is the organ that houses the developing embryo. The placenta is the structure that nourishes the embryo.

Notes:
the transpiration which takes place through the leaves is called foliar transpiration. The foliar transpiration may be stomata’ transpiration or cuticular transpiration.

Notes:
Silk worm yield the fibre from pupa stage, which is commercially used to produce clothes.

Notes:
Sericulture – It refers to the rearing of silk worms and obtaining silk from them. It involves raising a feed crop, chiefly mulberry leaves, and tending to silk worms and obtaining silk fibre from the cocoons produced by the worms.
Varieties – There are a number of varieties of worm reared for silk production, the most important variety being Bombyx mori.

Notes:
The branch of science that deals with the study of the mental faculties of the brain including emotions is known as Phrenology.