October 2023

Q. Forager bees communicate the distance of a food source using a waggle dance upon return to the hive. It is observed that the number of waggles of a dance increases linearly with the distance to the food source. This tells us that the A. number of waggles and distance to food source is negatively […]

Q. If both of your ears were located next to each other in the middle of your face, you would have difficulty in resolving the A. direction of a sound B. duration of a sound C. loudness of a sound D. pitch of a sound Ans: direction of a sound

Q. A duck egg is removed from its mother’s nest and incubated by a barnyard hen. The duckling hatches out in the presence of the barnyard hen and stays in her nest. After a couple of days, the duckling is presented with a choice between its biological mother and the hen that incubated it. The

Q. In group living species, the term “dilution effect” refers to A. reduction in aggression among individuals with increasing group size B. reduction in the mobility of individuals with increasing group size C. reduction in the reproductive success of individuals with increasing group size D. reduction in the risk of predation of individuals with increasing

Q. During the Pleistocene, which of the following groups experienced the largest mass extinction? A. Large dinosaurs B. Large mammals C. Reptiles D. Trilobites Ans: Large mammals

Q. Which of the following functions describe the graph shown in the below figure? (A) 𝑦 = ||𝑥| + 1| − 2 (B) 𝑦 = ||𝑥| − 1| − 1 (C) 𝑦 = ||𝑥| + 1| − 1 (D) 𝑦 = ||𝑥 − 1| − 1| Ans: y = ||x| − 1| − 1

Q. From the time the front of a train enters a platform, it takes 25 seconds for the back of the train to leave the platform, while travelling at a constant speed of 54 km/h. At the same speed, it takes 14 seconds to pass a man running at 9 km/h in the same direction

Q. Given that 𝑎 and 𝑏 are integers and 𝑎 + 𝑎2 𝑏3 is odd, which one of the following statements is correct? (A) 𝑎 and 𝑏 are both odd (B) 𝑎 and 𝑏 are both even (C) 𝑎 is even and 𝑏 is odd (D) 𝑎 is odd and 𝑏 is even Ans: a

Q. For integers 𝑎, 𝑏 and 𝑐, what would be the minimum and maximum values respectively of 𝑎 + 𝑏 + 𝑐 if log |𝑎| + log |𝑏| + log |𝑐| = 0? (A) -3 and 3 (B) -1 and 1 (C) -1 and 3 (D) 1 and 3 Ans: -3 and 3

Q. A number consists of two digits. The sum of the digits is 9. If 45 is subtracted from the number, its digits are interchanged. What is the number? (A) 63 (B) 72 (C) 81 (D) 90 Ans: 72 Sol: Let the two-digit number is AB The sum of digits = A + B =