Question

What was the evolutionary significance of jaws?

View Available Hint(s)

What was the evolutionary significance of jaws?

It allowed for increased competition between males vying for a receptive female.

It immediately allowed for the rapid expansion of herbivorous lifestyles over the lifestyle of predation.

Current evidence strongly suggests it improved the ability to capture prey.

It allowed for advanced communication between terrestrial animals.

Which mammals are oviparous?

View Available Hint(s)

Which mammals are oviparous?

Eutherians

Monotremes

Cetartiodactyls

Marsupials

To be endothermic means that ______.

View Available Hint(s)

To be endothermic means that ______.

the body is covered with an outer shell

body heat is internally generated

the body is lacking fur or feathers for insulation

body heat comes from an external source

How did the forehead and brow ridge of hominin skulls change through time?

How did the forehead and brow ridge of hominin skulls change through time?

The forehead and brow ridges became broader and wider in later skulls than in earlier skulls.

The forehead became taller and the brow ridges are more prominent in later skulls than in earlier skulls.

The forehead remained the same size, but the brow ridges became less prominent in later skulls than in earlier skulls.

The forehead became much larger, and the face became "flatter"; the brow ridges are less prominent in later skulls than in earlier skulls.

Which of these characteristics is the same in amniotic eggs and placental mammal eggs?

Which of these characteristics is the same in amniotic eggs and placental mammal eggs?

Amniotic eggs and placental mammal eggs both have a hard or leathery outer protective covering.

The chorion's gas exchange functions in amniotic eggs are replaced by the placenta in placental mammal eggs.

The embryos in amniotic eggs and placental mammal eggs both rely on the yolk for most of their nutrients.

Placental mammal eggs have all four membrane-bound sacs found in amniotic eggs but no shell.

Answer 1

1), The correct answer is option B and C

It immediately allowed for the rapid expansion of herbivorous lifestyles over the lifestyle of predation.

Current evidence strongly suggests it improved the ability to capture prey.

The evolution in jaws have allowed to capture a wide range of food, predation and defense.

2), The correct answer is option B

Monotremes are oviparous.

3),The correct answer is option B

To be endothermic means that body heat is internally generated.

4),The correct answer is option D

The forehead became much larger, and the face became "flatter"; the brow ridges are less prominent in later skulls than in earlier skulls.

These brow ridges does not serves an obvious function in related to any other function in our body. So gradually it became less prominant in human.

5),The correct answer is option B

The chorion's gas exchange functions in amniotic eggs are replaced by the placenta in placental mammal eggs.

In amniotic eggs chorion will perform the function of exchanging O₂ and CO₂.between the embryo and the external environment of the egg. while in mammal eggs placenta will exchange O₂ and CO₂