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Q. Chordate identity card. How are they characterized according to examples of representing beings, type of symmetry, basic morphology, germ layers and coelom, digestive system, circulatory system, respiratory system, excretory system, nervous system and types of reproduction?
Examples of representing beings: protochordates (ascidians, amphioxus), vertebrates. Basic morphology: notochord, branchial clefts, neural tube. Kind of symmetry: bilateral. Germ layers and coelom: triploblastics, coelomates. Digestive system: complete, deuterostomes. Respiratory system: branchial (in aquatic), cutaneous (in adult amphibians), pulmonary (others). Circulatory system: open in protochordates, closed in vertebrates. Excretory system: flame cells in protochordates and diffusion, kidneys in vertebrates. Nervous system: neural tube in embryos, cerebral vesicle and single ganglion in protochordates, brain within the spinal cord and cranium within the spinal column in vertebrates. Kind of reproduction: sexual, with or without larval stage.
a) Name three parts of the body where smooth (involuntary or unstriated) muscle may be found. b) In any one of your examples, say what the smooth muscle does.
What is the difference among sexual spores and gametes? Do humans present sexual spores or gametes? Sexual spores are structures formed from meiosis with ploidy (number of chro
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Tonicity and the plant cell. Table 3: Amount of water displaced by potato samples before and after experiment?
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Define two ways in which genetic recombination occurs during meiosis. Genetic recombination happens during crossing- over and independent assortment.
Q. Why is the concept of a single gene as ultimateunit of inheritance inadequate to provide a unitary explanation for protein synthesis, recombination and mutation? Answer:
Carbohydrates Fifty five to seventy per cent of the required energy in animals is derived from carbohydrates. However, fats and proteins can also be broken down and used for
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