Q. El Niño Southern Oscillation (ENSO) events have occurred approximately every 3-7 years over the last century. The cause of these ENSO events is related to A. large-scale air-sea interactions in the Pacific Ocean B. strong monsoon winds in the Indian Ocean C. the melting of icebergs in the Antarctic Ocean D. unsustainable overfishing in […]
Q. Which of the following is NOT essential for a behavioural trait to evolve by natural selection? A. The behavioural trait differs among individuals B. The behavioural trait is determined at least in part by genes C. The behavioural trait influences reproductive success D. The behavioural trait is determined entirely by genes Ans: The behavioural
Q. A scientist finds a new species of insect and sends a sample to a museum for confirmation. The curator of the museum designates it as a holotype for the newly identified species and asks the scientist to also provide samples of the opposite sex. This sample of the opposite sex is called the (A)
Q. Which of the following is NOT a characteristic of r-selected species? A. Early sexual maturity B. High juvenile mortality C. High parental care D. Large number of offspring Ans: High parental care
Which of the following is NOT a characteristic of r-selected species? Read More »
Q. Which of the following is NOT an example of phenotypic plasticity? A. Density-dependent swarming behavior in locusts B. Increase in DDT resistance in mosquitos C. Seasonal variation in plumage colouration in birds D. Temperature-dependent sex determination in turtles Ans: Increase in DDT resistance in mosquitos
Which of the following is NOT an example of phenotypic plasticity? Read More »
Q. Natural populations often deviate from Hardy-Weinberg equilibrium. One possible reason for this is (A) no migration (B) no selection (C) random mating (D) small population sizes Ans: small population sizes
Q. Which of the following is NOT typically a characteristic of early successional pioneer plants relative to late successional plants in a tropical rain forest? (A) Higher shade tolerance (B) Smaller seed size (C) Smaller size at maturity (D) Wind dispersed seeds Ans: Higher shade tolerance
Q. In which of the following plants is the dominant stage of the life cycle haploid? (A) Cycads (B) Ferns (C) Gymnosperms (D) Mosses Ans: Mosses
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Q. Copies of genes that arrive in a particular genome by horizontal gene transfer are known as (A) analogs (B) homologs (C) ohnologs (D) xenologs Ans: xenologs
Q. In which of the following mating systems is sperm competition likely to evolve? A. Monoandry B. Monogamy C. Polyandry D. Polygyny Ans: Polyandry
In which of the following mating systems is sperm competition likely to evolve? Read More »
