Animal Kingdom
Which of the following features is not present in the Phylum-Arthropoda?
Which of the following characteristics is mainly responsible for diversification of insects on land?
Insects are small in size and hence they are subjected to constant threat from the surrounding. For example, if the environment is dry, the body of the insects can easily become dry. Arthropods, including insects, used to live in the marine environment. Some of them migrated to the land and diversified to a large variety of insects that are living now successfully. One reason for this successful evolution to the land-based evolution of the insects is the development of exoskeleton. In contrast, other animals like mammals, birds etc. have an internal bone structure. The insect body is prevented from drying due to the presence of exoskeleton made up of chitin. Hence, the correct answer is the option A.
Which of the following features is not present in the Phylum-Arthropoda?
Which of the following features is not present in Periplaneta americana?
Match the following columns and select the correct option. Column-I Column-II (a) Gregarious, polyphagous pest (i) Asterias (b) Adult with radial symmetry and larva with bilateral symmetry (ii) Scorpion (c) Book lungs (iii) Ctenoplana (d) Bioluminescence (iv) Locusta
The chitinous exoskeleton of arthropods is formed by the polymerisations of
What are the reasons that you can think of for the arthropods to constitute the largest group of the animal kingdom?
Segmentation in the body is first observed in which of the following: (a) Platyhelminthes (b) Aschelminthes (c) Annelida (d) Arthropoda
Bilateral symmetry, segmentation, coelom and open circulatory system characterises which of the following Phyla?
You have discovered an animal having characters like, triploblastic, bilateral symmetry, coelomate, chitinous exoskeleton, head, thorax and abdomen as body parts, and Jointed appendages. You should place the animal under
Which of the following statements are incorrect? (i) Parapodia are lateral appendages in arthropods used for swimming. (ii) RaduIa in molluscs are structures involved in excretion. (iii) Aschelminthes are dioecious. (iv) Echinoderm adults show radial symmetry. (v) Ctenophorans are diploblastic.
Which one of the following groups of three animals is correctly matched with their one characteristic morphological feature? Animals Morphological features (a) Scorpion, spider, cockroach - Ventral solid central nervous system (b) Cockroach, locust, Taenia - Metameric segmentation (c) Liver fluke, sea anemone, sea cucumber - Bilateral symmetry (d) Centipede, prawn, sea urchin - Jointed appendages