Section 16.1- Animals_Vertebrates_Mammals

Question 1

characterized as living organisms that move from place to place in their environment, mainly for the purpose of obtaining food

Answer 1

animals

Question 2

two main characteristics of animals

Answer 2

mobility
diversity

Question 3

means can move their bodies from place to place

Answer 3

motile

Question 4

animals attached to one location but can move environment toward themselves for the purpose of trapping food

Answer 4

sessile

Question 5

number of classified species of animals alive today

Answer 5

over one million

Question 6

as biologists study the living creation, they observe than many living things possess the quality of

Answer 6

symmetry

Question 7

humans and most animals are constructed with a design called

symmetry that can be cut in half only in one plane to make each half look alike

Answer 7

bilateral symmetry

Question 8

the symmetry which is the basic blueprint from which God made most animals

Answer 8

bilateral symmetry

Question 9

symmetry possessed by a few animals such as a starfish

allows for an animal to be cut in half multiple ways and still have look-alike halves

Answer 9

radial symmetry

Question 10

symmetry possessed by a few animals such as the amoeba

means without symmetry

Answer 10

asymmtry

Question 11

animals with a backbone

Answer 11

vertebrates

Question 12

animals without a backbone

Answer 12

invertebrates

Question 13

vertebrates that make up only about _____________ of all animals

Answer 13

3%

Question 14

vertebrate characteristics

Answer 14

-spinal cord, brain, skull
-backbone or notochord endoskeleton– axial,
appendicular
-usually 11 body systems
-bilateral symmetry
-head and trunk

Question 15

internal framework or skeleton

Answer 15

endoskeleton

Question 16

animals with four appendages or limbs attached by special bones to the body at the hips and shoulders

Answer 16

tetrapods

Question 17

the most familiar the most dominant group of vertebrates on the earth today

Answer 17

mammals

Question 18

7 characteristics of mammals

Answer 18

1. warm-blooded
2. hair
3. produce milk
4. four-chambered heart
5. two pair limbs and seven neck vertebrae
6. born alive
7. breathe with lungs

Question 19

special structures in the skin of some mammals that are produced the same way as hair and are composed of keratin

Answer 19

horns
claws
nails
hoofs

Question 20

one of God’s most marvelous provisions for mammals

Answer 20

production of milk

Question 21

specialized epithelial cells that multiply when mammal is pregnant in order to produce milk

Answer 21

mammary glands

Question 22

animals that regulates their own temperature by internal mechanisms

Answer 22

warm-blooded

Question 23

maintaining the same temperature

warm-blooded animals such as mammals are said to be

Answer 23

homothermic

Question 24

when some small mammals such as ground squirrels and woodchucks, bears, raccoons, and opossums lower their body temperature to fall within a degree of two of the freezing point, lowering their heartbeat

Answer 24

hibernate

Question 25

the blood pressure falls greatly after the

Answer 25

blood gets through the lungs

Question 26

the difference between man and animals

Answer 26

man created in image of God
man has dominion over animals
man is moral
man will live forever in heaven

Question 27

ways mammals are important in nature beyond their benefit directly to man:

Answer 27

1. fertilize ground
2. help balance population of other plants and animals
3. most important source of raw materials

Question 28

mammals reproduce after their kind by

the union of a sperm cells from a male with and egg cell from a female to form a new organisms

Answer 28

sexual reproduction

Question 29

most mammals are considered ___________________ because their developing young receive nourishment from a placenta until birth

Answer 29

placental mammals

Question 30

where fertilization takes place in a mammal

corresponds to a fallopian tube in humans

Answer 30

oviduct

Question 31

the fertilized egg divides to form a hollow sphere of cells called a

Answer 31

blastula

Question 32

the blastula attaches itself to the wall of the

Answer 32

uterus

Question 33

the embryo of a placental mammal is nourished by the

Answer 33

placenta

Question 34

the embryo of a placental mammal is protected by the

Answer 34

amniotic fluid

Question 35

once a blastula is recognizable as a young individual, the animal is called a

Answer 35

fetus

Question 36

the entire period of growth from fertilization to birth is the

Answer 36

gestation period

Question 37

because their young are born alive, placenta mammals are

Answer 37

viviparous

Question 38

examples of mammals that birth eggs

Answer 38

echidna
platypus

Question 39

name for mammals that do not bear their live young

Answer 39

oviparous

Question 40

species that does not bear live young and spend the majority of their gestation outside of the womb

Answer 40

marsupials