2.As group size increased, energy intake per individual_ and energetic expenditu

Question

2.As group size increased, energy intake per individual_ and energetic expenditure per individual_

a.Decrease/decrease

b.decrease/increase

c.increase/decrease

d.increase/increase

3.In monogamous species, we expect to observe

a. no sexual size dimorphism/small testes

b.no sexual size dimorphism/ large testes

c. strong sexual size dimorphism/small testes

d.strong sexual size dimorphism/large testes

4.which of the following is True regarding the effect of food availability on female reproduction in Gray langurs(comparing food-enhanced and wild populations)?

a.gestation length is shorter in wild populations

b.females are older when their first infant is born in food-enhanced population

c. The interval between successive births is the same regardless of food avaliability

d.the number of infants per female over a lifetime is greater in wild population

5. Bachelor bands are most common in which type of mating system?

a.monogamy

b.polyandry

c.polygyny

d.polygamy

Explanation / Answer

Please find the answers below:

Part 2: Choice c (As the group size increases, the number of individuals also increases. This causes a competetiveness between the individuals for which there occurs increase in total energy intake with simultaneous decrease in total energy expenditure. This phenomenon reverses for the small groups where the energy intake per individual decreases)

Part 3: Choice d (sexual dimorphism is strong character for monogamous species. This is realized in terms of morphological as well as physiological features of the species. This can be easily observed in higher species such as mammals etc. This also leads to large variation between sizes of the genitalia of these organisms.)

Part 4: Choice d (The gray langur females produce generally a single infant at one time. Based upon their residence, it has been noticed that there is high frequency of infanticide in areas dominated by humans probably due to comeptetion for space and resources. Wild species generally do not face such problems of competetion thus there are more chances of survival. This leads to increase in total number of infants per mother over a lifetime for wild populations)

Part 5: Choice a (Monogamous species are those in which an organism mates only with one individual during their life time. In search for a suitable mate, such organisms prefer to stay in large groups where they can observe and judge the other potential mates. Thus, they tend to make large bachelor bands, for example monkeys.)

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