Prepare a list of some animals that are found parasitic on human beings.
[question] Question. Prepare a list of some animals that are found parasitic on human beings. [/question] [solution] Solution: [/solution]...
Match the following:
[question] Question. Match the following: [/question] [solution] Solution: [/solution]...
Segmentation in the body is first observed in which of the following:
[question] Question. Segmentation in the body is first observed in which of the following: (a) Platyhelminthes (b) Aschelminthes (c) Annelida (d) Arthropoda [/question] [solution] Solution: The body segmentation first appeared in the phylum, Annelida (annulus meaning little ring). [/solution]...
Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why?
[question] Question. Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why? [/question] [solution] Solution: The numbers of eggs produced by an oviparous mother will be more than the young ones produced by a viviparous mother. This is because in oviparous animals, the development of young ones takes place outside the mother’s body. Their eggs are more prone to environmental conditions and predators. Therefore, to overcome the loss, more eggs are prod...
What are the modifications that are observed in birds that help them fly?
[question] Question. What are the modifications that are observed in birds that help them fly? [/question] [solution] Solution: Birds have undergone many structural adaptations to suit their aerial life. Some of these adaptations are as follows. (i) Streamlined body for rapid and smooth movement (ii) Covering of feathers for insulation (iii) Forelimbs modified into wings and hind limbs used for walking, perching, and swimming (iv) Presence of pneumatic bones to reduce weight (v) Presence of addi...
How important is the presence of air bladder in Pisces?
[question] Question. How important is the presence of air bladder in Pisces? [/question] [solution] Solution: Gas bladder or air bladder is a gas filled sac present in fishes. It helps in maintaining buoyancy. Thus, it helps fishes to ascend or descend and stay in the water current. [/solution]...
“All vertebrates are chordates but all chordates are not vertebrates”. Justify the statement.
[question] Question. “All vertebrates are chordates but all chordates are not vertebrates”. Justify the statement. [/question] [solution] Solution: The characteristic features of the phylum, Chordata, include the presence of a notochord and paired pharyngeal gill slits. In sub-phylum Vertebrata, the notochord present in embryos gets replaced by a cartilaginous or bony vertebral column in adults. Thus, it can be said that all vertebrates are chordates but all chordates are not vertebrates. [/solu...
Water vascular system is the characteristic of which group of the following:
[question] Question. Water vascular system is the characteristic of which group of the following: (a) Porifera (b) Ctenophora (c) Echinodermata (d) Chordata [/question] [solution] Solution: Water vascular system is a characteristic feature of the phylum, Echinodermata. It consists of an array of radiating channels, tube feet, and madreporite. The water vascular system helps in locomotion, food capturing, and respiration. [/solution]...
What is the difference between direct and indirect development?
[question] Question. What is the difference between direct and indirect development? [/question] [solution] Solution: [/solution]...
What are the reasons that you can think of for the arthropods
[question] Question. What are the reasons that you can think of for the arthropods to constitute the largest group of the animal kingdom? [/question] [solution] Solution: The phylum, Arthropoda, consists of more than two-thirds of the animal species on earth. The reasons for the success of arthropods are as follows. i. Jointed legs that allow more mobility on land ii. Hard exoskeleton made of chitin that protects the body iii. The hard exoskeleton also reduces water loss from the body of arthrop...
What are the peculiar features that you find in parasitic platyhelminthes?
[question] Question. What are the peculiar features that you find in parasitic platyhelminthes? [/question] [solution] Solution: Taenia (Tapeworm) and Fasciola (liver fluke) are examples of parasitic platyhelminthes. Peculiar features in parasitic platyhelminthes are as follows. 1. They have dorsiventrally flattened body and bear hooks and suckers to get attached inside the body of the host. 2. Their body is covered with thick tegument, which protects them from the action of digestive juices of ...
Distinguish between intracellular and extracellular digestion?
[question] Question. Distinguish between intracellular and extracellular digestion? [question] [solution] Solution: [solution]...
How useful is the study of the nature of body
[question] Question. How useful is the study of the nature of body cavity and coelom in the classification of animals? [/question] [solution] Solution: Coelom is a fluid filled space between the body wall and digestive tract. The presence or absence of body cavity or coelom plays a very important role in the classification of animals. Animals that possess a fluid filled cavity between body wall and digestive tract are known as coelomates. Annelids, mollusks, arthropods, echinodermates, and chord...
If you are given a specimen,
[question] Question. If you are given a specimen, what are the steps that you would follow to classify it? [/question] [solution] Solution: There is a certain common fundamental feature that helps in classification of living organisms. The features that can be used in classification are as follows. On the basis of above features, we can easily classify a specimen into its respective category. [/solution]...
What are the difficulties that you would face in classification of animals,
[question] Question. What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account? [/question] [solution] Solution: For the classification of living organisms, common fundamental characteristics are considered. If we consider specific characteristics, then each organism will be placed in a separate group and the entire objective of classification would not be achieved. Classification of animals is also important in comparin...