OBJECTIVES

OBJECTIVES

Multiple Choice Questions:

1. The outer most layer of body of arthropods is:
(a) Epiderrnis        (b) Dermis        (c) Hypodermis           (d) Cuticle

2. The function of ridges and bar is
(a) Attachment       (b) Circulation      (c) Protection        (d) none

3. Sensilla are formed form:
(a) Epidermis         (b) Muscles                  (c) Cuticle             (d) Brain

4. Biramous appendages are present in:
(a) Chelicerata        (b) Crustacea       (c)Uniramia       (d) Trilobitomorpha

5. The extinct arthropods are:
(a) Trilobitomorpha     (b) Chelicemta        (c) Uniramia     (d) Crustacea

6. Their body is divided into prosoma and opisthosoma in:
(a) Chelicerata      (b) Crustacea        (c) Uniramia        (d)Trilobitomorpha

7. Book lungs are absent in:
(a) Merostomata       (b) Arachnida          (c) Pycnogonida       (d) None

8.Spiders belongs to:
(a) Merostomata       (b) Arachnida         (c) Pycnogonida           (d) None

9. Water scorpions belongs to:
(a) Pycnogonida         (b) Arachnida        (c) Merostomata          (d) None

10.Mites belongs to:
(a) A ruchnida             (b) Merostomata     (c) Nenouonida           (d) None

11. Triramous appendages belongs to:

(a) Remipedia         (b) Cephalocarida   (c)Branchiopoda       (d)Malacostraca

12. Crayfish belongs to:

(a) Remipedia           (b) Cephalocarida  (c)Branchiopoda     (d) Malacostraca

Ans:

1. (d) 2. (a) 3. (c) 4. (d) 5. (a) 6. (b) 7. (c) 8. (b) 9. (c)10. (a) 11. (b) 12. (d)    

Fill in the blanks

1. Chitin is a tough leathery ____

2. ………….. is a tanning process in which layers of protein is chemically cross-linked with one another.

3. Invaginations of the exoskeleton firm firm________ and bars.

4. The periodic shedding of exoskeleton for growth in arthropods is called molting process called _________

5. They have book gills on ________

6. Trilobite appendages consisted of two lobes or rami. These are called __

7. The second pair is called ____ in Chelicerata.

8. Opisthosoma is composed of a long and unsegmented_______

9…………………..is a structure present in members of specie which promotes reproductive success in new environmental situations.


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10. Theexoskeleton of the cephalothorax extends laterally and ventrally. It forms a shield like……………………………..

11. It contains setae and a group of cemented sand grains called a…………

12. Larval crustaceans have a single, median photoreceptor called……………..

Ans

1. polysaccharide      2. Sclerotization       3. ridges         4. ecdysis

5. opisthosoma          6. hiramous               7. pedipalps    8. telson

9. Preadaptation        10. carapace             11. statolith     12. ocelli

True/False

1. Chitin is a tough leathery protein.

2. Scelerotization is a tanning process in which layers of protein is chemically cross-linked with one another.

3. Invaginations of the exoskeleton form firm ridges and bars.

4. The periodic shedding of exoskeleton for growth in arthropods is called molting process called segmentation.

5. Trilobite appendages consisted of two lobes or rami. These are called biramous.

6. The second pair is called palp in Chelicerata.

7. Opisthosoma is composed of a long and unsegmented telson.

8. Preadaptation is a structure present in members of specie which promotes reproductive success in new environmental situations.

9. The exoskeleton of the cephalothorax extends laterally and ventrally. It forms a shield like plastron.

10. It contains setae and a group of cemented sand grains called a statolith.

11.Larval crustaceans have a single. median photoreceptor are called ocelli.

Ans .

1. F: polysaccharide 2. T                  3. T                  4. F: ecdysis               5. T

6. pedipalps               7. T                 8. T                  9. F: carapace            10. T

11. T


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