Mammals

Question 1

Which of these clades are considered mammals?

A. Eutherians
B. Metatherians
C. Amniotherians
D. Prototherians

Answer 1

A, B, D

Question 2

Metatherians are:

A. Monophyletic
B. Tetraphyletic
C. Polyphyletic
D. Paraphyletic

Answer 2

A. Monophyletic

Metatherians (marsuipals) are monophlyetic because a clade is a group of organisms that includes a common ancestor

Question 3

Paraceratherium was the largest living:

A. Aves
B. Mammal
C. Reptile
D. Shark

Answer 3

B. Mammal

Question 4

What is the role of Sebaceous glands?

Answer 4

lubrication of skin and hair

Question 5

____ are solid, shed seasonally, and are made of bone.

A. Horns
B. Scales
C. Antlers
D. Osteoderms

Answer 5

C. Antlers

Question 6

Which of these modifications are associated with mammals?

A. Fused clavicles, large keel on sternum
B. Spongey centre spines, scales, hollow horns
C. Antlers, osteoderms, spongey centred spines
D. cutaneous respiration, aposematism

Answer 6

B. Spongey centre spines, scales, hollow horns

Question 7

Horns are made of keratin or bone?

Answer 7

Keratin

Question 8

What are the two types of glands used for cooling?

A. Eccrine & Exocrine
B. Apocrine & Exocrine
C. Endocrine & Apocrine
D. Eccrine & Apocrine

Answer 8

D. Eccrine & Apocrine

Question 9

Eccrine glands:

A. found on most of the body and open directly onto skin surface
B. open into hair follicle
C. secrete substances into a ductal system
D. type of mammory gland triggered by prolactin

Answer 9

A. found on most of the body and open directly onto skin surface

Question 10

Apocrine glands open into ____ leading to skin surface

Answer 10

hair follicles

Question 11

Prototherians are:

a. ancestral chordates
b. monotremes
c. marsupials
d. placental

Answer 11

B. monotremes

think reptile like traits

Question 12

Metatherians are:

a. ancestral chordates
b. monotremes
c. marsupials
d. placental

Answer 12

C. marsupials

M & M

Question 13

Differentiated cervical, thoracic, lumbar, sacral and caudal vertebrae are associated with which group?

Answer 13

Mammals

Question 14

Highly differentiated and regionalization of the vertebrae is associated with:

Answer 14

Mammals

Question 15

Both birds and mammals have complete separation of ____.

Answer 15

Oxygenated and deoxygenated blood

Question 16

The systemic circuit pumps blood from heart to _____ back to heart.

Answer 16

body

Question 17

The pulmonary circuit pumps blood from heart to _____ back to heart.

Answer 17

lungs

Question 18

Double pumping means ____ separation of oxygenated and deoxygenated blood.

Answer 18

complete

Question 19

Mammals and crocodiles have a _____.

A. complex glandular system
B. 4 chambered heart with incomplete separation
C. Prolactin hormone
D. Muscular diaphrahm

Answer 19

D. Muscular diaphrahm

Question 20

Unlike amphibians, mammals have a ____ pressure breathing

A. positive gradient
B. negative gradient
C. passive gradient
D. countercurrent gradient

Answer 20

B. negative gradient

Question 21

A change of concentrations will always move from high to low. T/F

Answer 21

True

Question 22

For mammals, breathing in is an ___ process while breathing out is a ___ process.

Answer 22

active, passive

Question 23

Muscles controlling thoracic cavity relax and reduces the volume. Which causes air pressure to:

A. equalise
B. increase
C. decrease
D. deflate

Answer 23

B. increase

Question 24

In mammals, breathing out causes:

A. Muscles controlling thoracic cavity relax and reduces the volume, causes air pressure to increase
B. lower air pressure in lungs below external air
C. Muscle expansion in the thoracic cavity causing lower air pressure
D. air to flow through nostrils and mouth, down trachea, bronchi and bronchioles into alveoli

Answer 24

A. Muscles controlling thoracic cavity relax and reduces the volume, causes air pressure to increase

Question 25

The role of kidneys is to filter urea waste from ___

Answer 25

blood

Question 26

The organ that attach to ureters and drains nitrogenous waste to bladder is called

Answer 26

kidney

Question 27

tubules arranged in highly organized manner and closely associated with network of capillaries

Answer 27

Kidney

Question 28

Fish excrete nitrogenous waste in the form of ___, reptiles in the form of ___, and mammals in the form of ____. A. ammonia, uric acid, urea B. Uric acid, dark urine, ammonia C. Uric acid, ammonia, urea D. ammonia, urine, uric acid

Answer 28

A. ammonia, uric acid, urea

Question 29

Osmoregulation in mammal metanephric kidneys is controlled by + or - feedback hormones

Answer 29

negative

Question 30

heterogametic chromosomes means:

Answer 30

♂ X and Y

Question 31

homogametic chromosomes mean

Answer 31

♀ 2 X chromosomes

Question 32

Monotremes are a. viviparous b. oviparous c. ovoviviparous

Answer 32

b. oviparous

Question 33

All mammals have 4 limbs except A. Cetaceans B. Eulipotophyta C. Pinnipedia D. Chiroptera

Answer 33

A. Cetaceans

Question 34

Two occipital condyles where neck attaches to vertebrae means turning is limited, T/F?

Answer 34

True

Question 35

Which classes have a pinna? A. reptiles & amphibians B. chondrichthyes C. all chordata D. mammals only

Answer 35

D. mammals only

Question 36

Which mammalian order is the largest? A. Eulipotophyla B. Rodentia C. Chiroptera D. Primates

Answer 36

B. Rodentia