Practice MCQ Questions and answers on Biology-GK

Primary phloem develops from provascular tissue.

Other than spreading malaria, anopheles mosquitoes are also vectors of filariasis.

A halophyte is a salt-tolerant plant that grows in soil or waters of high salinity, coming into contact with saline water through its roots or by salt spray, such as in saline semi-deserts, mangrove swamps, marshes and sloughs and seashores.

Pyorrhoea, or periodontal disease, to give it a proper medical term, is a disease of the gums, it is one of the most widely prevalent diseases. It affects the membrane surrounding the roots of the teeth and leads to loosening of the teeth, pus formation, and shrinkage of the gum. This disease is the primary cause for tooth loss among adults.

Photosynthesis is the process by which plants use the energy of light to produce carbohydrates and molecular oxygen (O₂) from carbon dioxide (CO₂) and water.

Placenta is the structure formed by the union of foetal and uterine tissue.

Plants hormone that induces cell division is cytokinins.

Neurospora is used as genetic material because it has short life cycle of 10 days.

Phloem, also called bast, tissues in plants that conduct foods made in the leaves to all other parts of the plant. Phloem is composed of various specialized cells called sieve tubes, companion cells, phloem fibres, and phloem parenchyma cells.

N₂ content is kept constant in the biosphere due to nitrogen cycle.