Tetrapod Adaptations and Environmental Changes

The video discusses how tetrapods developed adaptations like bony limbs and lungs, which were beneficial both in aquatic environments and for transitioning to land. These adaptations allowed them to navigate difficult terrains and supplement oxygen intake. Moving to land offered advantages such as escaping aquatic predators, accessing new food sources like arthropods and insects, and surviving environmental changes like drying water bodies. These factors contributed to the spread and evolution of early tetrapods.

What adaptation allowed tetrapods to grasp the bottom and fight currents in aquatic environments?

• Scales

• Fins

• Bony limbs

• Gills

Which adaptation was crucial for tetrapods to navigate marshy areas?

• Scales

• Fins

• Limbs

• Gills

What was a challenge for tetrapods in open water that limbs helped overcome?

• Predator attacks

• Strong currents

• High temperatures

• Lack of food

Why were lungs an important adaptation for tetrapods?

• They improved vision underwater.

• They provided better buoyancy.

• They allowed breathing in low-oxygen water.

• They helped in swimming faster.

What was one of the main reasons tetrapods moved onto land?

• To avoid cold water

• To find new food sources

• To grow larger

• To swim faster

Which of the following was a new food source for early tetrapods on land?

• Algae

• Insects

• Fish

• Plankton

What was a significant predator threat to early tetrapods in aquatic environments?

• Birds

• Reptiles

• Mammals

• Aquatic predators

What was a characteristic of insects during the late Devonian period?

• They were aquatic.

• They were nocturnal.

• They were winged.

• They were wingless.

What environmental change during the Devonian period helped tetrapods spread onto land?

• Cooling of the climate

• Fusion of continents

• Formation of mountains

• Increase in ocean levels

How did the fusion of continents affect aquatic areas during the Devonian?

• Lowered their temperature

• Made them saltier

• Increased their size

• Made them more arid