Solution: Some animals that are found parasitic in humans are as follows: i. Ancylostoma (Hookworm) ii. Taenia (Tapeworm) iii. Enterobius (Pinworm) iv. Wuchereria (Filarial worm)...
14. Match the following:
Column IColumn II(a) Operculum(i) Ctenophora(b) Parapodia(ii) Mollusca(c) Scales(iii) Porifera(d) Comb plates(iv) Reptilia(e) Radula(v) Annelida(f ) Hairs(vi) Cyclostomata and Chondrichthyes(g)...
13. Segmentation in the body is first observed in which of the following:
(a) Platyhelminthes (b) Aschelminthes (c) Annelida (d) Arthropoda Solution: Form the four given options the correct answer is (c) Annelida
12. Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why?
Solution: No, the number of eggs or young produced by an oviparous and viviparous mother are not equal; the number of eggs produced by oviparous mothers is higher in comparison because fertilisation...
11. What are the modifications that are observed in birds that help them fly?
Solution: The following are some of the differences identified in birds that aid in flight: (i) Feathers are present. (ii) To aid flight, forelimbs are transformed into wings. (iii) Scales on the...
10. How important is the presence of air bladder in Pisces?
Solution: Air bladder in Pisces regulates Buoyancy which prevents fishes from sinking.
9. “All vertebrates are chordates but all chordates are not vertebrates”. Justify the statement.
SolutionThe phylum chordate is distinguished by the presence of Notocard and paired pharyngeal gill slits. Adults, on the other hand, replace the vertebrata notocard in the embryo in the subfilm...
8. Water vascular system is the characteristic of which group of the following:
(a) Porifera (b) Ctenophora (c) Echinodermata (d) Chordata Solution: From the four given options the correct answer is (c) Echinodermata This is a trait of theirs. A perforated panel known as...
7. What are the reasons that you can think of for the arthropods to constitute the largest group of the animal kingdom?
Solution: The causes of arthropods, which constitute up the largest group of animal kingdoms, are listed below. (i) They have jointed legs, which enable them to move about and perform a variety of...
6. What are the peculiar features that you find in parasitic platyhelminthes?
Solution: The parasitic Platyhelminthes have the following characteristics: (i) Parasitic forms that live on their own. (ii) The observed bodily organisation is tissue organ grade. (iii)...
5. What is the difference between direct and indirect development?
Solution: Direct developmentIndirect developmentIt can be found in fish, reptiles, birds, and mammals.Occurs in in vertebrate amphibiansThe embryo develops into a fully developed human without going...
4. Distinguish between intracellular and extracellular digestion?
Solution: Intracellular digestionExtracellular digestionIt can be found in lower organismsOccurs in multicellular organismsOccurs within cellsOutside the cell, within the cavity of the ailmentry...
3. How useful is the study of the nature of body cavity and coelom in the classification of animals?
Solution: Coelomates are animals that have a coelom, which is a bodily cavity or fluid-filled area lined by the mesoderm. The mesoderm does not cover the body cavity in some animals; instead, the...
2. If you are given a specimen, what are the steps that you would follow to classify it?
Solution: The following are the steps to classify the specimen: (i) Determine the level of organisation: Determine how cells are organised at the cellular and tissue levels. (ii) Symmetry: Determine...
1. What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account?
Solution Animals are classed based on shared characteristics such as cell organisation, body symmetry, coelom type, digestive tract, circulation, and reproductive system. It is impossible to handle...