my dearest students, here you are the model answers for chapter 1 G6

1. Complete the following sentences :
1. Organisms are grouped into 6 levels of classifications
2. the largest level of classification is kingdom ,but the scientific name of the organism is identified by its genus and species
3. the most complex organisms are in the kingdom of animals
4. The grouping of things according to their similarities is called classification
5. Bacteria are single-celled organisms that do not have a nucleus
6. Most scientists classify organisms according to their cell Structure and how they get food and reproduce
7. The grouping of things according to their similarities is called classification
8. Linnaeus first grouped all organisms into two very large groups called kingdoms
9. vascular plants such as maple trees have tubes for transporting materials throughout the plant
10. in nonvascular plants, materials pass from cell to cell
11. the vascular plants usually grow tall.
12. lions ,horses and pears are some examples of animals phyla
13. Invertebrates are animals that do not have a backbone
14. the most abundant animals on Earth are without backbone
15. cnidarians ,mollusks ,arthropodsare vertebrate groups of animals



2. Rewrite the following sentences in the right way:
1) Animals are monocellular organisms
Animals are multicellular organisms

2) Seastars are from mollusks phylum
Seastars are from echinoderms phylum

3) Horsetails make seeds in cones
Conifers make seeds in cones



3. Complete the following graphic organizers:

organisms

are divided into


6 kingdoms




Archaebacteria Eubacteria protists
Fungi
Animals plants

Are divided into Are divided into


Vertebrates invertebrates vascular nonvascular

(with backbone) (without backbone) (with tubes) (without tubes)
its classes are: its classes are: are 2 groups such as:
fish cnidarians seed plants
Amphibians sponges seedless plants mosses
Reptiles Arthropods

Birds mollusks
Mammals worms

4. give the scientific reason for each of the following:

1. scientists put organisms such as butterflies, spiders and houseflies in one class
Because their bodies are divided into sections

2. bacteria are not classified as plants or animals.
Because bacteria are single-celled organisms that do not have a nucleus. Plants and animals are multicellular, and their cells have nucleus


3. fungi do not grow in deserts
Because they live in moist environment

4. materials can not travel quickly through mosses plants
Because they do not have tubes to transport materials
5. you can not see jellyfish and anemones live on land
because their bodies would dry out

5. Imagine what could happen if :
1. scientists found a new organism that its body seems to have sections
They may classify it as segmented worm , insect or arthropod

2. plants can not trap the sunlight energy.
Plants can not make their own food and will die

6. give one difference between each pair of the following:
1. Angiosperms- gymnosperm
Angiosperms are flowering plants but gymnosperms are not flowering

2. chordates –echinoderms
Chordates are vertebrate animals but echinoderms

3. worms – clams
worms live on land but clams live in water