Clearly Stated: Evidencia de la evolución

Which of the following characteristics do whales share with terrestrial mammals, but not with fish?

• They live in water.

• They have gills for breathing.

• They are viviparous and produce milk.

• They have fins for swimming.

What anatomical feature found in whales provides evidence of their evolutionary link to terrestrial mammals?

• Their streamlined body shape.

• The presence of arm, wrist, hand, and finger bones within their front flippers.

• Their ability to hold their breath for extended periods underwater.

• The presence of baleen plates for filter feeding.

What observation during dolphin embryonic development supports the idea that whales evolved from four-legged land animals?

• Dolphin embryos develop gills that later disappear.

• Early dolphin embryos show limb buds for hind legs that later recede.

• Dolphin embryos have a blowhole from the earliest stages of development.

• The brain development in dolphin embryos is identical to that of fish.

How does the development of a dolphin's blowhole provide evidence for its evolutionary history?

• The blowhole is present from the very first stages of embryonic development.

• The blowhole develops from gills, similar to fish.

• Nostrils initially form at the front of the face and then migrate to the top of the head, fusing into a single blowhole.

• The blowhole is a unique feature with no mammalian equivalent.

What anatomical feature of the Basilosaurid whale skull indicates its status as an intermediate species in whale evolution?

• Its large eye sockets.

• The presence of baleen plates.

• Its narines located in the middle of the skull.

• A highly elongated snout.

Despite being fully developed, what was the primary limitation of the Basilosaurid whale's leg bones?

• They were too fragile to support its body weight.

• They were too small for walking on land.

• They lacked proper joints for movement.

• They were vestigial and had no function.

Which of the following provides strong evidence for classifying Maiacetus inuus as an ancient whale, even though it possessed hip bones strong enough for walking?

• Its diet consisted solely of terrestrial plants.

• Its skeletons were found alongside marine creature fossils.

• It had a blowhole on top of its head.

• Its teeth were identical to modern land mammals.

Based on DNA analysis, which modern animal shares the closest genetic relationship with whales?

• Fish

• Sea lions

• Hippopotamuses

• Dolphins