Name of Student : ___________________________

Teacher’s Name : MR. CHRIS

Class : F2A1Lesson No. : 11

Date : 10 – APRIL - 2013Time : 12.15PM – 2.00PM

SEKOLAH MENENGAH SERI OMEGA, JOHOR BAHRU

Subject : ScienceChapter / Topic : 3.0 BiodiversitySub-Topic : 3.1 Understanding variety of living organisms and their

classification.

What is biodiversity?

1. The living things found on Earths are human, animals and plants.

2. A living thing is known as an organism

3. Animals and plants have various shapes, sizes and habitats.

4. The differences that exists between the same species of living things are called

variations/ diversity of life/ or biodiversity.

Habitat of living things

1. A natural place where plants and animals live is called a habitat.

2. Different animals and plants live in different habitats.

3. A habitat is important to an organism because

a. It provides the organism with food.

b. Protection

c. Space for breeding

HABITAT of living things

Animals Plants

Bird Tree Lotus Lake

Snake Bushes Mushroom Wood

Amoeba Pond Durian tree Orchid

Whale Sea Duckweed Pond

Camel Dessert Coconut tree Seashore

Termite Wood Cactus Dessert

Classification of Living Organism1. Classification of living organism such as plants and animals can be done based on

their common characteristics.

2. A classification system is required to group living things methodically because of

their large number and types.

3. Although they possess common characteristics, organisms from the same species

still have distinctive characteristics which differentiate them from other species.

4. Classification is important to enable more in-depth scientific studies to be carried out

for the improvement of the species themselves.

5. Examples of classification of animal based on their habits and their breathing organs

are shown below.

Classification of animals

Habitat Breathing organs

Land water Water &

Land

Gills Lungs Moist Skin

Examples

Eagle Whale Crab Turtle Horse Frog

Chicken Prawn Seahorse Crocodile Duck Toad

snake Crab eel Frog Cow

Classification of Animals1. Groups of animals can be classified according to similarities in characteristics,

features and structures.

2. Common characteristics are characteristics that are possessed by two or more types

of species.

3. Common characteristics in animals include methods of reproduction, types of food

habitats and physical features.

4. Classification of animals by common characteristics:

Characteristic of animal Examples

Live in water Crab, fish, shrimp, oyster, squid, cockle and

jellyfish

Live on land Dog, chicken, cat, squirrel, mouse, elephant, tiger

and deer

Live in water & on land Crocodile, frog, turtle, seal and otter

Reproduces by laying eggs Hen, fish, bird, crab, duck, goose and cockroach

Reproduces by giving birth Whale, dolphin, porcupine, pangolin, bat, rabbit

and cow

Herbivorous Rabbit, cow, goat, giraffe, squirrel, snail and

grasshopper

Carnivorous Lion, tiger, piranha, crocodile, snake, frog

Omnivorous Chicken, duck, cat, cockroach, mouse, bear

Body covered with hair Cat, dog , cow , rabbit , bear, bat

Body covered with feathers Bird, penguin, chicken and duck

Body covered with scales Fish, pangolin, lizard, snake, monitor lizard

5. Animals can be classified into 2 big groups:

a. Animals with backbones

b. Animals without backbones

6. Animals with backbones are known as vertebrates7. Animals without backbones are known as invertebratesANIMALSvertebratesfishamphibiansreptilesmammalsbirds

8. Vertebrates are divided into 5 main groups. The 5 main groups are:

a. Fish

b. Bird

c. Mammals

d. Reptile

e. Amphibian

9. Classification of vertebrates and their characteristics:

a. FISH

Characteristics of fish:

1. Habitat : water

2. Type of blood: Cold-blooded ( poikilothermic ) – body temperature change according

to the temperature of the surroundings.

3. Characteristics of body: streamlined; covered by slimy scales; moves using fins and

tails

4. Breathing organ: Gills

5. Method of reproduction: Lays eggs ( except sharks and seahorses – give birth to

young)

6. Type of fertilization : external fertilization

7. Examples are fish and eel

b. BIRD

Characteristics of birds:

1. Habitat : land

2. Type of blood: Warm-blooded ( homoiothermic ) – fixed body temperature

3. Characteristics of body:

i. covered by feathers

ii. have beaks

iii. legs covered with dry scales

iv. move using wings and legs

4. Breathing organ: Lungs

5. Method of reproduction:

i. Lays eggs

ii. Eggs have shell

6. Type of fertilization : internal fertilization

7. Examples are bird and chicken

c. REPTILE

Characteristics of reptiles:

1. Habitat : water and land

2. Type of blood: Cold-blooded ( poikilothermic )

3. Characteristics of body: covered by dry and hard scales , move using limbs and tails

4. Breathing organ: Lungs

5. Method of reproduction:

i. Lay eggs

ii. Eggs have shells ( rattle snakes give bith to young)

6. Type of fertilization : internal fertilization

7. Examples are snakes and crocodiles

d. AMPHIBIANS

Characteristics of amphibians:

1. Habitat : water ( the young ones ) and land ( adults )

2. Type of blood: Cold-blooded ( poikilothermic )

3. Characteristics of body: covered by moist skin ; moves with limbs and tails

4. Breathing organ:

i. Gills ( tadpole stage )

ii. Lungs ( adult stage )

iii. Moist skin ( adult stage )

5. Method of reproduction:

iii. Lay eggs

iv. Eggs have no shells

6. Type of fertilization : external fertilization

7. Examples are toad and frog

e. MAMMALS

Characteristics of mammals:

1. Habitat : land ( whales and dolphins are 2 exceptions)

2. Type of blood: Warm-blooded ( homoeothermic )

3. Characteristics of body:

i. covered by fur or hair

ii. have external ears

iii. have sweat glands

iv. have mammary ( milk) glands ( produce milk from young )

v. move using limbs.

4. Breathing organ: Lungs

5. Method of reproduction: Give birth to young ( except platypuses and anteaters)

6. Type of fertilization : internal fertilization

7. Examples are cat, rabbit and goat

Unusual characteristics of some mammals1. Bats – have wings and fly like birds

2. Whales and dolphins – live in water like fish

3. Pangolin – lays eggs and have beaks like ducks

4. Platypus – lays eggs and have beaks like ducks

5. Porcupines – the body is covered with spines for protection.

6. Kangaroos and koalas – raise the young in their body pouches.

Invertebrates1. Invertebrates are generally animals without backbones.

2. The support system of invertebrates consists of:

a. Exoskeleton such as hard shell. Examples are crabs, prawns and centipede

b. Hydrostatic frame. Examples are earthworms, caterpillar and planarians

3. Generally, the physical characteristics of invertebrates are much more simpler than

vertebrates.

4. Most microorganism are invertebrates. For examples, coelenterates ( Hydra and

Jellyfish) and protozoa ( Paramecium and Amoeba ).

5. Invertebrates also can be broadly classified into 2 groups. The 2 groups are:

a. With jointed legs

b. Without jointed legs

Invertebrates

Invertebrates with jointed legs Invertebrates without jointed legs

Example

Crab, Spider, centipede, millipede , butterfly Earthworm, flatworm, sea anemone, starfish

and snail.

VERTEBRATES

BIRDS REPTILES FISH

M: ………………………. N: ……………………….

Diagram 2

Exercises

1. Diagram 2 shows the classification of vertebrates.

(a) What groups do M and N represent? Label M and N on Diagram 2.

[2 marks]

(b) State one difference between group M and group N. ………………………………………………………………………………………………………………………………………………………………………………………………………..

[1 mark]

(c) Name one group of vertebrate which is cold-blooded.

………………………………………………………………………………………………………

[1 mark]

(d) Which group of vertebrates has feathers?

………………………………………………………………………………………………[1 mark]

(e) Which group of vertebrate gives birth to their young?

…………………………………………………………………………………………………[1 mark]

RP

SQ

Diagram 4

Common characteristics

P, Q, R and S

Names of animals

2. Diagram 4 shows four different animals, P, Q, R, and S.

(a) Based on your observation in Diagram 4, state one characteristic of each animal.

P………………………………………………………………….……………. …..

Q………….…………………………………………………………………………

R :……………..…………………………………………………………………….

S:…………...……………………………………………………………………….

(b) Classify the animals in Diagram 4 into two groups based on their common characteristics. Name the animals belonging to each group.

P

………………………...

Q

………………………...

R

………………………...

Diagram 5

P

Q

R

Breathe with lungs, cold-blooded, skin covered with hard and dry scales

Breathe with lungs, cold-blooded, skin covered with hard and dry scales

Breathe with lungs, warm-blooded, lay eggs with hard shells

Breathe with lungs, warm-blooded, give birth to live young

Animal Characteristics

3. Diagram 5 shows animals P, Q and R.

(a) Which group of vertebrates do P, Q, and R represent? Write the answers in Diagram 5

[3 marks]

(b) Match P, Q, and R to its correct common characteristics.

[3 marks]