Question

When male langurs take over another male's group, they sometimes kill all the

young infants. What is the evolutionary explination for this behavior?
It increases the reproductive succecc of the male.
It causes the infants' mothers to stop lactating and resume cycling.
The mothers become sexually receptive to the new male.
All of the above.

Answer 1

The evolutionary explanation for male langurs killing infants is to increase reproductive success.

Step-by-step explanation:

The evolutionary explanation for male langurs killing young infants when taking over another male's group is that it increases the reproductive success of the new male. By eliminating the existing infants, the new male can then father his own offspring and ensure they have a better chance of survival and reproduction.

This behavior also causes the infants' mothers to stop lactating and resume cycling. When the mothers become sexually receptive again, it enables the new male to mate with them and increase his own reproductive success.

Therefore, the correct answer is 'All of the above'. This behavior is driven by evolutionary factors that promote the new male's genetic legacy and maximize his reproductive success.

Learn more about Evolutionary explanation for male langurs killing infants