classification

Question 1

list three reasons for classification

Answer 1

1) to help identify organisms
2) to better understand their relationships and connections
3) to understand organism evolution

Question 2

define classification

Answer 2

process of arranging organisms into groups based on similar characteristics

Question 3

define artificial classification

Answer 3

involves grouping organisms based on observable physical characteristics only

Question 4

what is a dichotomous key

Answer 4

often used in diagrams dividing organisms into 2 groups at a time usually until each organism has been identified
only used characteristics u can see/measure

Question 5

define taxonomy

Answer 5

study of classifying
naming describing classifying of organisms

Question 6

what classification system is commonly used

Answer 6

Linnean classification

Question 7

list the 8 levels of the linnean classification system

Answer 7

domain, kingdom, phylum, class, order, family, genus, species

Question 8

define prokaryotes (5)

Answer 8

organisms possessing genetic material not bound by a membrane within cell
single cell/unicellular
does not have nucleus
contains bacteria kingdom
before nucleus

Question 9

define eukaryotes

Answer 9

organisms possessing genetic material bound by double membrane
multicellular
have nucleus
contains animal plant fungi protist kingdoms
true nucleus

Question 10

what does “kary” mean

Answer 10

means nucleus of a cell

Question 11

list 5 kingdoms

Answer 11

bacteria, animal, fungi, plants, protists

Question 12

why do viruses not belong to any kingdom

Answer 12

have no ability to carry out grimner on their own
needs an organism and cannot survive in a test tube on their own

Question 13

define chordates

Answer 13

phylum of the animal kingdom
commonly known as vertebrates
include all animals with a backbone
divided into 5 classes

Question 14

what are the five classes of chordates

Answer 14

animals birds reptiles amphibians fish

Question 15

what is the scientific name for warm blooded

Answer 15

homeothermic

Question 16

what is the scientific name for cold blooded

Answer 16

poikilothermic

Question 17

fish (4)

Answer 17

cold blooded
gills
scales and fins
lay eggs or live birth in water

Question 18

amphibians (4)

Answer 18

cold blooded
gills and lungs
thin moist skin
lay jelly like eggs in water

Question 19

reptiles (4)

Answer 19

cold blooded
lungs
scales
lay feathery eggs in land/live birth

Question 20

bird (4)

Answer 20

warm blooded
lungs
feathers
lay hard eggs on land

Question 21

mammals (4)

Answer 21

warm blooded
lungs
hair
live birth and feed young milk

Question 22

classification of human

Answer 22

kingdom - animals (organisms able to move on their own)
phylum - chordates (animals with a backbone)
class - mammals (chordates with fur and animal glands
order - primates (mammals with collar bones and grasping fingers)
family - hominins (primates with relatively flat faces and 3d vision)
genus - homo (hominins with upright posture and large brains)
species - homo sapiens (members of the genus homo with a Hight forehead and thin skull bones)

Question 23

define arthropods (4)

Answer 23

invertebrates
have an exoskeleton (waterproof outer covering)
animals with several pairs of jointed legs
segmented bodies

Question 24

list the 5 classes of arthropods

Answer 24

insects, chilopods, diplopods, crustacea, arachnids

Question 25

insects (6)

Answer 25

3 body segments - head body thorax
3 pairs of jointed legs
1 pair of antennae
usually 2 pairs of wings (sometimes vestigial)
breathe through tracheae
butterfly, ant, grasshopper

Question 26

arachnid (4)

Answer 26

head and thorax fused to form cephalothorax
4 pairs of jointed legs
breathe through gills called book lungs
spiders scorpions ticks mites

Question 27

chilopods (4)

Answer 27

many body segments (14-20)
1 pair of jointed legs per segment
front segment has large pair of poison claws
centipedes
(carnivores)

Question 28

diplopod (3)

Answer 28

many body segments (50)
2 pairs of jointed legs per segment
millipedes (detritovores)

Question 29

crustacea (3)

Answer 29

more than 4 pairs of jointed legs
breathe through gills ‘woodlice lobsters shrimp crabs

Question 30

define binomial nomenclature

Answer 30

each organism given a scientific name made up of the genus and species