CLASSIFICATION

Question 1

NAME THE two main divisions of the animal kingdom

Answer 1

1. INVERTEBRATES(NON_CHORDATA)
2. VERTEBRATES(CHORDATA

Question 2

LIST THE three levels intowhich Invertebrates aredivided

Answer 2

1.cellular level-PHYLUM PORIFERA
2.tissue level-ohylum cnidaria
3. organ system level

Question 3

list three division of the organ system level in Invertebrates

Answer 3

1.Acoelomata(No body cavity)
2.Coelomata(Body cavity)

Question 4

List the phylums that belong to Acoelomata

Answer 4

1. phylum platyhelminthes
2. phylum nematoda

Question 5

List the phylum that belongs to coelomata

Answer 5

1. Phylum Annelida
2. Phylum Anthropoda
3. phylum mollusca
4. phylum echinodermata

Question 6

List the classes of vertebrates(chordata)

Answer 6

1. class pisces
2. class amphibia
3. class reptiles
4. class aves
5. class mamalia

Question 7

list the divisions of class pisces

Answer 7

1. cartilaginous fish
2. bony fish

Question 8

list down some characteristics of platyhelminthes

Answer 8

1.they have a flattened and unsegmented body with a distinct head and tail
2.they have a simple nervous system mostly a brain and a diffuse nerve net
3.they reproduce sexually and asexually
4.they have a simple digestive sysystem with one or two openings
5.they have no specializes respiratory or circulatory system
6.they have a simple excretory system eg. flame cells

Question 9

give examples of platyhelminthes

Answer 9

1.planarians
2.tapeworms
3.flukes

Question 10

give the importance of platyhelminthes

Answer 10

they are important parisites of humans that causes a wide range of diseases and inections

Question 11

list down the characteristics of nematodes

Answer 11

1.they have a long cylindricaland unsegmented body with a well defined head and tail
2.they have a well developed nervous system and a specialized sensory organs
3.they have pseidocoelom that is not completely lined by mesoderm
4.they have sexual and asexual reproductive systems
5.they have a simple digestive and excretory system

Question 12

define pseudocoelom

Answer 12

its a fluid filled body cavity that gives support and protects internal structures

Question 13

list down some examples of nematodes

Answer 13

1.swell dwelling nematodes
2.plant parasitic nematodes
3.animal parasitic nematodes

Question 14

list down some characteristics of anelida

Answer 14

1.they have segmentedbody that allows for specialized segments and appendages
2.they have well developed coelom
3.they have a welldeveloped nervous system and sensory organs
4.they have a closed circulatory system and a specialised organs like gills
5.they have sexual and asexual reproductive systems

Question 15

gie the examples of annelids

Answer 15

1.earthworms
2.leeches
3.polychaete worms

Question 16

list down the characteristics of anthropods

Answer 16

1.they have a segmented body with jointedappendages such as legs and antennae
2.they have an exoskeleton
3.they have a well developed nervous system and specialized sensory organs such as comp[ound eyes
4.they have speciallized respiratory system like gills
5.they have specialised circulatory system and an open circulatory system

Question 17

give examples of anthropods

Answer 17

1.insects
2.spiders
3.crustaceans
4.millipedes

Question 18

give four examples of mollusks

Answer 18

1.snails
2.clans
3.octopus
4.squids

Question 19

what are the characteristics of mollusks

Answer 19

1.theyhave a soft unsegmented body that is often protected by a hard shell
2.they [posses a muscular foot that is used for movement
3.they have a visceral mass that contains the interna organs
4.they have a radula,a tong -like organ covered in small teeth used for feeding
5.they have a specialised circulatory and excretory system

Question 20

what are the characteristics of echinoderms

Answer 20

1.they are a diverse group of marine animals
2.theyhave unique water vascular system
3.they have a five part radial symmetry

Question 21

give the function of the vascular system in

Answer 21

1.it is used for movement
2.it is used for feeding
3.it has spines or external structures

Question 22

examples of echinoderms

Answer 22

1.sea cucumber
2.star fish

Question 23

give some examples of ovoviviparous organisms

Answer 23

1.sharks
2.pit vipers
3.seahorse
4.praying mantis
5.salamanders
6.kangaroos

Question 24

what are viviparous organisms

Answer 24

they are organisms in which fertilization and embryo development occur inside them

Question 25

give some examples of viviparous organisms

Answer 25

1.humans 2.cats 3.dogs 4.primates

Question 26

what are oviparous animals

Answer 26

they are animals that reproduce by laying eggs.both fertilisation andembryo development occurs externally

Question 27

give examples of oviparous animals

Answer 27

1.frogs 2.fish 3.snakes

Question 28

what are ovoviviparous animals

Answer 28

they are animals in which there is internal fertilisation and the young are born alive but there is no placenta connection between the mother and the unborn

Question 29

write short note on oviparity in fishes

Answer 29

.fish lay eggs in water .they female fish lay eggs in batches .a single batch may contain thousands of eggs collectively called spawns .the eggs develop and hatch on their own without any further parental care.

Question 30

explain oviparity in amphibians

Answer 30

1.amphibians like frogs lay egg in water 2.amphibianseggs have no shells 3.they lay eggs in clutches 4.lateron the mature embryo comes out of the egg under propper conditions 5.after the eggs are released from the body they take up water and get bigger.

Question 31

explain oviparirity in reptiles

Answer 31

1.reptiles makes holes in the ground and lay eggs in them 2.after laying the eggs the mother leaves and comes back to nurture the babies 3.the eggs have shells but the shells are leathery and elastic like 4.the eggs get warmth and light from the sun and when the embryo matures it breaks the egg shells and comes out

Question 32

explain oviparity in birds

Answer 32

1.birds build their nests and then lay eggs in them 2.they sit on the eggs to keep them warm 3.parents take care of their newly hatched chicks feed them and stay with them until they mature and start flying

Question 33

write short notes on viviparous animals

Answer 33

1.theyhave body hair and have mammmary glands 2.the babies feed on their mothers milk 3.they have developed brains and external ears 4.babies develop inside their mothers