Life sciences and classification — UPSC Prelims PYQs

Consider the following pairs: Plant — Description I. Cassava — Woody shrub II. Ginger — Herb with pseudostem III. Malabar spinach — Herbaceous climber IV. Mint — Annual shrub V. Papaya — Woody shrub How many of the above pairs are correctly matched?

Consider the following statements: 1. Lions do not have a particular breeding season. 2. Unlike most other big cats, cheetahs do not roar. 3. Unlike male lions, male leopards do not proclaim their territory by scent marking. Which of the statements given above are correct?

Which of the following organisms perform waggle dance for others of their kin to indicate the direction and the distance to a source of their food?

Consider the following statements: 1. Some microorganisms can grow in environments with temperature above the boiling point of water. 2. Some microorganisms can grow in environments with temperature below the freezing point of water. 3. Some microorganisms can grow in highly acidic environment with a pH below 3. How many of the above statements are correct?

Consider the following statements: 1. Biofilms can form on medical implants within human tissues 2. Biofilms can form on food and food processing surfaces. 3. Biofilms can exhibit antibiotic resistance. Which of the statements given above are correct?

Which of the following statements are correct regarding the general difference between plant and animal cells? 1. Plant cells have cellulose cell walls whilst animal cells do not. 2. Plant cells do not have plasma membranes unlike animal cells which do. 3. Mature plant cell has one large vacuole whilst an animal cell has many small vacuoles. Select the correct answer using the code given below:

Consider the following statements: 1. Some species of turtles are herbivores. 2. Some species of fish are herbivores. 3. Some species of marine mammals are herbivores. 4. Some species of snakes are viviparous. Which of the statements given above are correct?

Consider the following 1. Birds 2. Dust blowing 3. Rain 4. Wind blowing Which of the above spread plant diseases?

With reference to prepackaged items in India, is it mandatory to the manufacturer to put which of the following information on the main label, as per the Food Safety and Standards (Packaging and Labeling) Regulations, 2011? 1. List of ingredients including additives 2. Nutrition information 3. Recommendation, if any, made by the medical profession about the possibility of any allergic reactions 4. Vegetarian/nonvegetarian Select the correct answer using the code given below.

Consider the following: 1. Bats 2. Bears 3. Rodents The phenomenon of hibernation can be observed in which of the above kinds of animals?

Which one of the following sets of elements was primarily responsible for the origin of life on the Earth?