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AP Biology Unit 7C1: Evolution & Animal Structural Organisation — practice questions

Explore 80 free Unit 7C1: Evolution & Animal Structural Organisation questions in AP Biology Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 7C1: Evolution & Animal Structural Organisation questions and exercises with answers

Showing questions 1–30 of 80.

The similar bone and joint structure in the human hand, whale flipper and bat patagium is taken as which evidence of evolution?Read the answer and worked solution →To which phylum does the Indian cattle leech, Hirudinaria granulosa, belong?Read the answer and worked solution →Into how many segments is the body of a leech metamerically divided?Read the answer and worked solution →The temporary clitellum of the leech, which produces a cocoon during breeding, is formed on which segments?Read the answer and worked solution →How many pairs of eyes are present on the dorsal side of a leech?Read the answer and worked solution →The posterior sucker of a leech is formed by the fusion of how many segments?Read the answer and worked solution →Which anticoagulant protein, secreted by the salivary glands of a leech, prevents the host's blood from clotting?Read the answer and worked solution →Which part of a leech's alimentary canal is the largest and stores blood in about ten chambers?Read the answer and worked solution →Respiration in a leech is carried out through its:Read the answer and worked solution →Excretion in a leech is carried out by segmentally arranged paired tubules called:Read the answer and worked solution →Why is the leech described as a hermaphrodite animal?Read the answer and worked solution →Which of the following is a parasitic adaptation of the leech?Read the answer and worked solution →To which class of the phylum Chordata does the common rabbit, Oryctolagus cuniculus, belong?Read the answer and worked solution →Which muscular partition separates the thoracic cavity from the abdominal cavity in a rabbit?Read the answer and worked solution →In the rabbit, which structure houses bacteria that help in the digestion of cellulose?Read the answer and worked solution →The existence of two successive sets of teeth, the milk teeth and permanent teeth, in a rabbit is called:Read the answer and worked solution →Which type of teeth is completely absent in the rabbit, leaving a gap called the diastema?Read the answer and worked solution →In the rabbit's respiratory pathway, which structure prevents food from entering the trachea?Read the answer and worked solution →The heart of a rabbit is:Read the answer and worked solution →In the rabbit heart, the left auriculoventricular aperture is guarded by which valve?Read the answer and worked solution →How many pairs of cranial nerves are present in the rabbit?Read the answer and worked solution →In the rabbit brain, the band of nerve tissue connecting the right and left cerebral hemispheres is the:Read the answer and worked solution →In the rabbit, the kidneys remove nitrogenous waste from blood and excrete it mainly in the form of:Read the answer and worked solution →In the female rabbit, the common tube formed by the union of the urinary bladder and the vagina is called the:Read the answer and worked solution →The three domains that diverge from a single point on a rooted phylogenetic tree are Bacteria, Eukarya and:Read the answer and worked solution →The category directly below the domain in the classification hierarchy is the:Read the answer and worked solution →Referring to an organism by its genus and species, its two-word scientific name, is called:Read the answer and worked solution →A diagram showing evolutionary pathways and connections among organisms is a:Read the answer and worked solution →Cladograms are constructed by using which kind of trait to separate groups?Read the answer and worked solution →Features that overlap both in form and genetically, stemming from developmental similarities based on evolution, are:Read the answer and worked solution →

Worked practice questions

The similar bone and joint structure in the human hand, whale flipper and bat patagium is taken as which evidence of evolution?

  1. Morphological evidence
  2. Embryological evidence
  3. Anatomical evidence
  4. Palaeontological evidence
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Correct answer: C. Anatomical evidence

1. The human hand, ox foreleg, whale flipper and bat patagium look very different on the surface. 2. Each is also used for a different purpose in its animal. 3. Yet their internal bones and joints follow a similar arrangement. 4. Internal structural similarity points to a common ancestor. 5. Such internal evidence is classed as anatomical evidence. 6. Trap (morphological): that concerns external form similarity, but here the surface forms differ. 7. Trap (embryological): that uses embryo stages, not adult bone structure. 8. Trap (palaeontological): that uses fossils, which are not involved in this comparison. 9. So the correct category is anatomical evidence. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 1 "Heredity and Evolution", p.13_

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To which phylum does the Indian cattle leech, Hirudinaria granulosa, belong?

  1. Annelida
  2. Chordata
  3. Arthropoda
  4. Mollusca
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Correct answer: A. Annelida

1. The Indian cattle leech is Hirudinaria granulosa. 2. It is a metamerically segmented worm. 3. Such segmented worms belong to Phylum Annelida. 4. Chordata is the phylum of the rabbit, not the leech, so it is the trap. _Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 13 Structural Organisation of Animals "Introduction", p.194_

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Into how many segments is the body of a leech metamerically divided?

  1. 26 segments
  2. 33 segments
  3. 17 segments
  4. 11 segments
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Correct answer: B. 33 segments

1. Metamerism is the segmentation of the body. 2. The leech body is metamerically divided into 33 segments. 3. So the correct count is 33. 4. The number 26 refers to the segment bearing the anus, not the total, so it is the trap. _Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 13 Structural Organisation of Animals "External Morphology", p.195_

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