Item 4
Read the passage from Darwin's journal.

. . . The nature of this lizard’s food, as well as the structure of its tail and feet, and the fact of its having been seen voluntarily swimming out at sea, absolutely prove its aquatic habits; yet there is in this respect one strange anomaly, namely, that when frightened it will not enter the water. Hence it is easy to drive these lizards down to any little point overhanging the sea, where they will sooner allow a person to catch hold of their tails than jump into the water. . . Perhaps this singular piece of apparent stupidity may be accounted for by the circumstance that this reptile has no enemy whatever on shore; whereas, at sea it must often fall a prey to the numerous sharks. Hence, probably, urged by a fixed and hereditary instinct that the shore is its place of safety, whatever the emergency may be, it there takes refuge.

What observation did Darwin note to draw the conclusion that the A. cristatus lizard has predators in the sea?

It has feet and a tail adapted for swimming.

It eats aquatic plants.

It will not go in water when scared.

It voluntarily swims out to sea.

The observation that led Darwin to conclude that the A. cristatus lizard has predators in the sea is that it will not go in the water when scared.

What is a predator?

It is an organism that kills and eats other organisms.

What observation leads Darwin to his conclusion?

Even when A. cristatus lizard is scared it does not enter the water. This observation leads to the conclusion.

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