Question

11. Which of the following pairs are mismatched in arthropods? A. compound eyes-vision B. olfactory receptors-smell antennae - touch & sense environment tube feet-locomotion 12· The distinction between protostomes and deutensames is based on differences in their A. digestive tracts B. nervous systems C. circulatory systenss E. eye spots 13. Most mollusks have a A. jointed appendages B. suckers used in for feeding. C. radula D. tube feet E. teeth 14. Which of the following pairs are mismatched in mollusks, specifically cephalopods? A. nervous system-brain B. C. excretory system-metanephridium D. circulatory system-heart (closed circulatory system) respiratory system-book lungs 15. Which annelids till and aerate the soil to improve texture of the soil? A tapeworms B. nematodes C. carthworms D. Christmas tree worms E. leeches The function of the lophophore include A. as a surface for gas exchange C. to secrete a shell B. as a food collecting organ 16. E. A,B&C D. A& B 17. Which of the following animals are blood-sucking parasites feed by attaching temporarily to other animals including humans also secretes hirudin, an anticoagelant, into the wound, which allows the animal to suck as much blood as it can hold? C. sea star D. carthworm E. comb jelly B. leech Which ofth⑩ following is not one of the key innovations in animal evolution? B. symmetry 18. C. body cavity D. embryonic development (protostome to deuterostome E. Which of the following is not a characteristic of arthropods? A. cnidocytes B. jointed appendages 19. C. coelomates 20. Facing the internal cavity of sponges, are flagellated, collared cells whose beating drives water through the body cavity that adds in feeding are known as A. choanocytes C. nephridia D. sporocytes E. proglottids MATCHING I1: Indicate the type of body cavity (acoelomate, pseudocoelomate or coelomate) in the following animals. If the animal does not have one, indicate none (1.0 pt each). I. sponges 2. Arthropods 3. Platybelminthes (Clatworms) 4. Nematoda (roundworms) Indicate the type of symmetry (radial or bilateral) in the following animals. MATCHING III: does not have one, indicate none (1.0 pt each). If the animal 4. Nematoda (roundworms) 5. Annelids 6. sponges Mollusks

Answer 1

Q11. D) Tube feet - Locomotion.

Arthropods show locomotion by jointed appendages.

Tube feet are present in star fish.

Q12. D) Embryonic development.

Explanation:

Metabo ans are divided into protostomes and deuterosomes on the basis of embryonic development.

Protostomes are primitive invertebrates while as deuterosomes include echinoderms and chordates.

Q13. C) Radula.

Explanation:

Single shelled mollusks have ribbon shaped tongue called as Radula which is covered with rasping teeth which allows them to feed upon algae.

Q14. B) Respiratory system - book lungs.

Explanation:

Cephalapods are called as advanced molluscs as they are the only which have closed circulatory system with heart in mollusks.

They have highly developed brain.

They have gills for respiration.

They have metanephridia to excrete wastes.