Problem 6 - Biology of Humans: Concepts, Applications, and Issues

Question

Which of the following is not characteristic of primates? a. high parental investment in a small number of young b. forward-facing eyes c. claws d. grasping feet and hands

Step-by-Step Solution

Answer

Option c) claws.

Step 1: Understand the Characteristics of Primates

Primates typically have several distinct characteristics. These include high parental investment in a small number of young, forward-facing eyes for better depth perception, and grasping feet and hands with opposable thumbs for better manipulation of objects.

Step 2: Review Each Characteristic in the Options

Review each option given in the question: a) high parental investment in a small number of young, b) forward-facing eyes, c) claws, d) grasping feet and hands. Compare these with the typical characteristics of primates.

Step 3: Identify the Odd One Out

Option a) high parental investment in a small number of young is seen in primates. Option b) forward-facing eyes is also a primate characteristic. Option d) grasping feet and hands is another primate feature. However, option c) claws are not characteristic of primates, as they generally have nails instead of claws.

Step 4: Conclusion

Based on the comparison, identify which option does not fit the typical characteristics of primates.

Key Concepts

primate anatomy

Primates possess unique anatomical features that distinguish them from other mammals. One of these is their ability to grasp objects. This is made possible by their opposable thumbs, which means their thumbs can move to touch and work with the other fingers.

They have forward-facing eyes, which allows them to better judge distances and gain depth perception. This is valuable for navigating through trees and grabbing objects.

Additionally, primates typically do not have claws. Instead, they have flat nails, which provide more sensitive and precise control during manipulation. These anatomical features collectively support the arboreal lifestyle and complex behaviors seen in primates.

primate behavior

Primate behavior is quite sophisticated and involves high levels of social interaction. High parental investment is a key characteristic, where parents spend a significant amount of time nurturing and educating their young.

This investment ensures that the young primates learn essential skills for survival. Primates often live in social groups that have intricate structures and hierarchies.

These groups enable them to cooperate, share resources, and protect each other from predators. Communication is also advanced among primates, including various vocalizations, body language, and facial expressions. This complexity in behavior aids in the successful survival and reproduction of primate species.

evolution of primates

The evolution of primates shows a fascinating journey from primitive ancestors to the complex beings we see today. Primates evolved around 55-65 million years ago, after the age of dinosaurs. Changes in their environment led to adaptations such as grasping hands and feet, essential for life in trees.

Forward-facing eyes developed to improve depth perception, crucial for navigating through forests. The transition from claws to nails is another significant evolutionary step, allowing for more refined movement and interaction with the environment.

High parental investment evolved to enhance the chances of offspring survival in competitive environments. All these evolutionary traits developed over millions of years, allowing primates to become highly intelligent and social animals, capable of surviving and thriving in diverse habitats.