Evolutionary Adaptations in Vision and Plants

47 million years ago, plants developed fleshy fruits to adapt to dense forests, relying on birds for seed distribution due to lack of wind. Birds ate the fruits and spread the seeds. Primates, living in trees, needed color vision to identify ripe fruits. While most mammals see in black and white, some primates regained color vision, allowing them to exploit the plant-bird system. Plants evolved color signals to indicate seed maturity, which primates learned to recognize, enhancing their survival and adaptation.

Why did plants develop large, fleshy fruits 47 million years ago?

• To attract insects for pollination

• To adapt to dense forest environments

• To increase photosynthesis

• To store more water

How did plants solve the problem of seed distribution in forests?

• By growing taller

• By recruiting birds

• By using water currents

• By relying on mammals

What was the primary role of birds in the plant adaptation process?

• Pollinating flowers

• Distributing seeds

• Providing shade

• Protecting plants from predators

What adaptation did primates need to fully exploit the fruit system?

• Better hearing

• Improved night vision

• Enhanced sense of smell

• Improved vision

What did mammals sacrifice to develop better night vision during the dinosaur age?

• Ability to see color

• Ability to climb trees

• Ability to hear high frequencies

• Ability to run fast

Which group retained excellent color vision?

• Fish

• Mammals

• Reptiles and birds

• Insects

Why did plants evolve a color-coding system for their fruits?

• To attract more insects

• To signal when fruits are ripe

• To change leaf color

• To increase fruit size

What remarkable feat did some primates achieve regarding vision?

• They developed night vision

• They reacquired color vision

• They learned to fly

• They developed infrared vision

What advantage did the common ancestor of monkeys and humans gain by evolving color vision?

• Ability to see in the dark

• Ability to identify ripe fruits

• Ability to swim

• Ability to fly

How did the common ancestor of monkeys and humans benefit from the plant-bird system?

• By living in bird nests

• By flying with birds

• By identifying ripe fruits

• By eating bird eggs