Standard Science Primary 4 Cycles

In the life cycle of a frog shown below, what is the main difference between Stage X and the Adult stage?

A Stage X breathes through gills while the Adult breathes through lungs and skin.
B Stage X can reproduce while the Adult cannot.
C Stage X has four legs while the Adult has none.
D Stage X lives on land while the Adult lives only in water.
Show Worked Solution

Worked Solution

Step 1: Stage X is the tadpole stage. Step 2: Tadpoles are aquatic and use gills. Step 3: Adult frogs develop lungs and use their moist skin to breathe on land and in water.

Correct answer: Stage X breathes through gills while the Adult breathes through lungs and skin.

Want more questions like this? Superholic Lab has 10,000+ MOE-aligned questions with full worked solutions.

Start Free Trial — 7 Days Free