Evolution of Mammals

Label the phylogenetic tree

a

b

c

d

Bauria

Casea

nose bones

ear bones

Dimetrodon

short tail

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

What is NOT a purpose of nasal turbinate bones?

• increase smell

• warm air

• moisten air

• cool air

How did jaw closing muscles change from extinct reptiles to mammals?

• Jaw closing muscles expanded in mammals to allow for side to side movement.

• Jaw closing muscles became smaller in mammals compared to extinct reptiles.

• Jaw closing muscles became less powerful in mammals than in extinct reptiles.
• Jaw closing muscles remained unchanged from reptiles to mammals.

Tags

NGSS.MS-LS4-2

How can differentiated teeth aid the animal?

• Differentiated teeth help animals to breathe more easily.
• Differentiated teeth allow them to efficiently eat different types of food.

• Differentiated teeth are used for communication between animals.
• Differentiated teeth are sharper for meat.

What is the purpose of the secondary palate?

• to separate the nasal cavity so animals can breathe and chew at the same time

• to separate the esophagus and trachea when swallowing

• to expand the taste buds for detecting poison

• to increase the sense of smell in mammals

Tags

NGSS.MS-LS4-2

​ (a)   developed from (b)   . Because of this, we can ​ (c)   through our ​ (d)   bone.

• jaw bones
• Ear bones
• hear
• lower jaw
• eat
• ears

How does upright limb posture help mammals?

• They can run longer distances.

• They can reach the leaves in trees.

• They are able to walk through the water without sinking.

• They can defend themselves with better balance.

Reptiles have (a)   to store fat. Mammals have ​ (b)   to ​ (c)   the energy needed to move.

• long tails
• short tails
• reduce
• increase

Which food source helped mammals survive and evolve after the extinction of the dinosaurs?

• legumes

• palm trees

• grass

• fish

The two major discoveries at the Coral Bluffs were discovered by paleontologists.

• True

• False; they were discovered by a teacher and a student.

• False; one was discovered by a teacher and the other by a paleontologist.

• False; one was discovered by a student and the other by a paleontologist.