Biology MCQs

Notes:
R.H. Whittaker proposed an elaborated five kingdom classification. He was the first to propose the five-kingdom of organisms taxonomic classification of the world’s biota into the Animalia, Plantae, Fungi, Protista, and Monera in 1969. He also proposed the Whittaker Biome Classification, which categorized biome-types upon two abiotic factors: temperature and precipitation.

Notes:
Strawberry is the fruit which has its seeds outside the body. The “seeds” on the outside of a strawberry are actually the plant’s ovaries and are called “achenes.” Each “seed” is technically a separate fruit that has a seed inside of it.

Notes:
Scurvy is the name for a vitamin C deficiency. It can lead to anemia, debility, exhaustion, spontaneous bleeding, pain in the limbs, and especially the legs, swelling in some parts of the body, and sometimes ulceration of the gums and loss of teeth.

Notes:
Guttation takes place due to the development of root pressure. Guttation is the exudation of drops of xylem sap on the tips or edges of leaves of some vascular plants, such as grasses and a number of fungi.

Notes:
A neuron or nerve cell is a cell that carries electrical impulses. Neurons are the basic units of the nervous system. Every neuron is made of a cell body (also called a soma), dendrites and an axon. Dendrites and axons are nerve fibers. It is the longest cell of human body.

Notes:
The thermoregulatory center in the hypothalamus controls the temperature at which the human body operates. There are two sets of thermoreceptors involved in the controlling of the body temperature.

Notes:
Hybridoma technology is used to commercially production of monoclonal antibodies. The monoclonal antibodies are protective protein produced by the clone of single immune cell.

Notes:
Surface layer/ A layer which is rich in humus content is responsible for seed germination. Living organisms which aids the production (such as earthworms) also are present in this layer.

Notes:
Chloroplasts are green because they contain the pigment chlorophyll, which is important for photosynthesis. Chlorophyll occurs in many different forms. Chlorophyll a and b are the major pigments of higher plants and green algae.

Notes:
The biological nature of viruses was discovered in 1892 by the Russian scientist Dmitry I. Ivanovsky and in 1898 the Dutch scientist Martinus W. Beijerinck’s studies.