Biology Online Quiz

Silverfish, Starfish and Cuttlefish are not true fish. Silverfish is not a fish but an insect. Starfish is not a fish. It do not have gills, scales, or fins. Cuttle fish is not the fish but is a Mollusc belonging to the class Cephalopoda. Dogfish are small, bottom-dwelling sharks.

Photoperiodism (Photo means light and period means length of time) affects Vegetative growth, Flowering and Fruiting. Photoperiodism is the developmental responses of plants to the relative lengths of light and dark periods. It affects the vegetative growth as well as the time of flowering and fruiting in plants.

There are 23 chromosomes in a human ovum and 23 chromosomes in human sperm. Healthy humans have 23 pairs of chromosomes in which 22 pairs are autosomes and 2 are sex chromosomes. The ovum (female gamete) is formed by the meiosis due to which they have only the half number of chromosomes, which means 22 autosomes (11 pairs) and 1 sex chromosome.

The maximum fixation of solar energy is done by green plants. Between 98 and 99 percent of solar energy reaching Earth is reflected from leaves and other surfaces and absorbed by other molecules, which convert it to heat.

Nepenthes is an insect-catching plant. It is a genus of carnivorous plants, also known as tropical pitcher plants, or monkey cups, in the monotypic family Nepenthaceae.

The mineral constituent of chlorophyll is Magnesium (Mg). The chlorophyll molecule consists of a central magnesium atom surrounded by a nitrogen-containing structure called a porphyrin ring; attached to the ring is a long carbon-hydrogen side chain, known as a phytol chain. Other elements (not minerals) like carbon, nitrogen, oxygen and hydrogen are also present in chlorophyll.

Smallpox is an acute contagious disease caused by the variola virus, a member of the orthopoxvirus family. In 1980, the World Health Organization declared that smallpox had been eradicated.

EEG (electroencephalogram) is used to detect the functioning of the Brain. It is a test that detects electrical activity in the brain using small, metal discs (electrodes) attached to the scalp.

A polymer is a substance or material consisting of very large molecules, or macromolecules, composed of many repeating subunits. polyethylene (alse known as Polythene) is a light, versatile synthetic resin made from the polymerization of ethylene.

Soybean is the richest known source of edible protein. The protein content of soybeans is 36–56% of the dry weight. Soybean protein is known as a complete protein as it provides all of the essential amino acids for human nutrition.