All Free Biology MCQs with Answers

• A. Parthenogenesis
• B. Apomixis
• C. Sexual Reproduction
• D. Asexual Reproduction

Explanation: Cloning produces genetically identical individuals without gamata fusion, so it is a form of asexual reproduction.

• A. Use of surrogate mothers
• B. Superovulation
• C. Artificial insemination
• D. All of these.

Explanation: High milk-yielding cows are produced using superovulation to obtain multiple eggs, artificial insemination to introduce superior male genes, and surrogate mothers to carry the fertilized embryos. Therefore, all these techniques improve genetic quality and productivity.

• A. Introduction and mutation
• B. Selection and introduction
• C. Selection and hybridization
• D. Mutation and selection

Explanation: Selection is the process of choosing the plants with desirable characters and then they maintained and those with undesirable characters were eliminated whereas the method of producing new crop varieties in which two or more plants of unlike genetical constitution crossed together is known as hybridization

• A. Gambusia
• B. Cutter fish
• C. Anabus
• D. Rohu

Explanation: The name "mosquitofish" was given because the fish eats mosquito larvae, and has been used more than any other fishes for the biological control of mosquitoes.

• A. Potato and tomato
• B. Shimla mirch and brinjal
• C. Maize and chichinda
• D. Bitter gourd

Explanation: There are several fruits and vegetables that were introduced to India by Europeans during colonial times. Some examples include: Tomatoes, Potatoes, Capsicums (Bell peppers), Paas, Cabbages, Carrots, Pumpkins, Watermelons.

• A. Grafting
• B. Tissue Culture
• C. Genetic Engineering
• D. Cell Culture

Explanation: Genetic engineering involves the direct manipulation of genetic material (DNA) to achieve practical and beneficial outcomes.

• A. Insulin
• B. Interferons
• C. Vaccines
• D. Edible proteins

Explanation: Animal cell culture is widely used today to mass-produce vaccines for diseases like polio, hepatitis, and COVID-19.

• A. Cashewnut, potato, rubber
• B. Mango, tea
• C. Tea, rubber, mango
• D. Coffee

Explanation: Crops like cashewnut, potato, and rubber were introduced to India from the New World (Americas), while mango, tea, and coffee are native or from the Old World.

• A. White revolution
• B. Green revolution
• C. Yellow revolution
• D. Blue revolution

Explanation: First the start of the Green Revolution in Pakistan, Pakistan adopted the technique of using dwarf varieties of grain in the 1960's. These new types of grain were more responsive to fertilizer and thus would be able to grow in harsh environments as long as there a source of fertilizer (Child 275).

• A. Crotalaria juncea and Alhagi camelorum
• B. Calotropis procera and Phyllanthus niruri
• C. Saccharum munja and Lantana camara
• D. Dichanthium annulatum and Azolla nilotica

Explanation: Crotalaria juncea and Alhagi camelorum are used as green manure in crop fields and sandy soils because these plants.