Class 10th Science Biology Experiment 6 Characteristics of Non-chordate animals Solutions & Answer.
Aim : To study characteristics of non-chordates (1) Earthworm (2) Cockroach.
Requirements : Specimens of earthworm and cockroach.
Procedure : Observe the specimens. Write their characteristics and give the classification.
1. Earthworm
Diagram :
Label the different parts in the given diagram.
Female genital poreAnusClitellumMale genital poreSegmentsMouth
Earthworm
Classification of Earthworm :
- Kingdom : Animalia
- Subkingdom : Non-chordata
- Phylum : Annelida
- Scientific name : Pheretima posthuma
Observations : Characteristics of Earthworm.
- The body of earthworm is elongated and cylindrical. It has mouth and anus at the opposite ends.
- The body is metamerically segmented, with about 100 to 125 segments in the body.
- A prominent brown-coloured band called clitellum is present in the anterior region of the body coveringthe segments 14th, 15th and 16th.
- Earthworm is a bisexual animal crawling in soil. It is said to be a friend of farmer
- It is used for vermicompost, therefore they play an important role in solid waste management.
Diagram : Label the different parts in the given diagram.
Classification of Cockroach :
- Kingdom : Animalia
- Subkingdom : Non-chordata
- Phylum : Arthropoda
- Class : Insecta
- Scientific name : Periplaneta americana
Observations :
Characteristics of cockroach :
(1) The body of cockroach is narrow, bilaterally symmetrical and dorsoventrally flattened.(2) The whole body is covered externally by a chitinous cuticle. (3) The body of cockroach is divisible into three parts, viz., head, thorax and abdomen.(4) The head on its each side bears a large compound eye and a long, slender and segmented antenna.(5) There are 3 pairs of walking legs.(6) Cockroach is a nocturnal pest which is carrier of diseases.
Multiple Choice Questions
Choose the correct alternative and write its letter (A), (B), (C), (D) in the box :
1. To which phylum does Earthworm belong ?
(A) Platyhelminthes (B) Aschelminthes (C) Annelida (D) Arthropoda
Answer: C
2. Cockroach is an insect but spider is not because
(A) cockroach and spiders belong to different phyla. (B) cockroach has 3 pairs of legs and spider has 4 pairs of legs.(C) cockroach has jointed appendages but spider does not have.(D) spider can build a web but cockroach cannot.
Answer: B
3. Earthworm is called a friend of farmer but cockroach is not. Why?
(A) Cockroach is a pest and carrier of some human diseases.(B) Cockroach cannot dig the soil.(C) Cockroach is hard bodied insect. (D) Cockroaches do not stay on the fields.
Answer: A
4. The only common character between earthworm and cockroach is
(A) both breathe by tracheae. (B) both excrete by nephridia. (C) both have spiracles. (D) both are non-chordates.
Answer: D
5. Clitellum of earthworm is present in which segments?
(A) 8, 9,10 (B) 11, 12,13 (C) 14, 15, 16 (D) 16, 17, 18
Answer: C