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AshutoshB
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egmat can you explain the answer Choice? How does daytime activity of high flying birds affect the nocturnal activity?

We know nothing about what these birds do during night time.

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My answer is B.

In deciduous forest, trees lose their leaves in winter months, while the rain forest is covered year-round. This is the reason helps the birds see the prays in daytime.
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I do not understand the reasoning. If they are preyed upon in daytime, should they not be more active during daytime so they can escape? They can actually relax during the night when they don't have to worry about the predator.
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Vishalcv
I do not understand the reasoning. If they are preyed upon in daytime, should they not be more active during daytime so they can escape? They can actually relax during the night when they don't have to worry about the predator.

Vishalcv, They hide/become inactive when the predators are out and about.
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Can someone explain option C.
how I interpreted was, since snakes are active in the night so lemur living in rain forest has better canopy to hide so snakes can't find them, but for deciduous lemurs as they are exposed so they will be frequently chased by the snakes, or maybe they need to keep running and find new hideouts thus their nocturnal activity is high.
AshutoshB
A recent study examined the daytime and nighttime activity patterns of two populations o f tree-dwelling lemurs-the first living in a rain forest, where tree canopy cover is consistent year-round, and the second living in a deciduous forest, where many trees lose their leaves during the winter months. Both groups of lemurs were found to be more nocturnal during winter months than they were the rest of the year. However, the winter increase in nocturnal activity was significantly more pronounced for the population living in the deciduous forest than it was for the population living in the rain forest.

Which one of the following, if true, most helps to explain the difference between the two lemur populations with respect to winter activity patterns?


A. For both lemur populations, the primary competitors for food resources are species active during daylight.

B. The primary predators for both lemur populations are high-flying birds that rely on their eyesight to hunt prey during daylight.

C. In both habitats, species of predatory snakes active during daylight are most active during winter months.

D. The lemur population in the rain forest is twice the size of the population in the deciduous forest.

E. The lemur population in the rain forest eats both plants and insects whereas the population in the deciduous forest eats only plants.

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