Final answer:
To predict which primate species are likely to eat a large portion of leaves in their diet, consider their evolutionary history, diet preferences, and adaptations for an arboreal lifestyle.
Step-by-step explanation:
To predict which species from a group of primates would be most likely to include a large portion of leaves in their diet, we can consider several factors:
- Evolutionary history: Primate ancestors mainly ate fruits, and being able to spot colored fruits in the leafy background of trees was important. So, species that share a closer evolutionary relationship with fruit-eating primates may be more likely to eat a large portion of leaves as well.
- Diet preferences: Fruit is the preferred food for most primate species. Therefore, species that heavily rely on fruits might also include a large portion of leaves in their diet.
- Adaptations and habitats: Primates evolved in trees, and many of their traits are adaptations for an arboreal lifestyle. Leafy diets are plentiful in tree canopies. Therefore, species that live primarily in trees might depend on leaves as a significant food source.