Animal Sciences

Understanding the correct matching
- A - Hemidactylus = II (Wall Lizard)
- The genus Hemidactylus includes species of wall lizards, which are commonly found in homes.
- B - Ptyas = V (Rat Snake)
- The genus Ptyas includes rat snakes, non-venomous colubrid snakes.
- C - Columba = IV (Pigeon)
- Columba is the genus of pigeons, commonly found in urban areas.
- D - Macropus = I (Kangaroo)
- Macropus is the genus of kangaroos, native to Australia.
Examining the given options
- Option 1 (A-II, B-V, C-IV, D-I) → Correct, as it matches all elements correctly.
- Option 2 (A-II, B-V, C-III, D-I) → Incorrect (Mismatch in C).
- Option 3 (A-I, B-V, C-IV, D-II) → Incorrect (Mismatch in A and D).
- Option 4 (A-III, B-II, C-I, D-IV) → Incorrect (Completely mismatched).
Conclusion
Since the correct matching is A-II, B-V, C-IV, D-I, the correct answer is Option (1).

The vertebrae of birds are Heterocoelous. Heterocoelous vertebrae are those that have a saddle-shaped structure, providing greater flexibility in the neck and the body. This type of vertebrae is characteristic of birds.

The pseudopodia in Euglpha are filopodia. Filopodia are slender, thread-like extensions of the cell membrane that are used by amoeboid cells for movement and feeding. These pseudopodia consist of actin filaments and are found in various protists, including Euglpha.

- Chylomicrons, which are fat droplets absorbed in the small intestine, are transported via the lacteals, which are specialized lymphatic vessels located in the villi of the intestine.
- Blood capillaries are involved in the absorption of other nutrients like glucose and amino acids but not chylomicrons.
- Interstitial fluid and veins are not directly involved in transporting chylomicrons from the intestinal villi.

Step 1: Understanding Photokinesis
- Photokinesis is the change in movement speed due to light intensity, without directional movement.
- Phototaxis involves movement toward or away from light.
- Phototropism is directional growth toward light (in plants).
- Photoperiodism refers to biological responses to light duration (e.g., flowering).

Step 1: The first statement about the red data book is correct because the red data book contains the list of threatened species.
Step 2: The second statement is also correct, as national parks, sanctuaries, and biosphere reserves are examples of ex-situ conservation methods.
Step 3: The third statement is correct because a biosphere reserve is a protected area for conservation that is minimally disturbed.
Step 4: The fourth statement is incorrect as -diversity refers to the variation in species composition among ecosystems, not by counting the number of taxa within one area. Thus, the correct statements are I and III.

Understanding the characteristic features of each phylum
- I - Porifera (Choanocytes) → Incorrect
- Porifera (sponges) are characterized by choanocytes, but the given example Physalia is incorrect.
- Physalia belongs to Cnidaria, not Porifera.
- II - Cnidaria (Stinging Cells) → Incorrect
- Cnidarians (jellyfish, corals) have stinging cells (cnidocytes), but the example Euspenigia is incorrect.
- The correct example should be Obelia or Hydra.
- III - Ctenophora (Lasso Cells) → Correct
- Ctenophores (comb jellies) have lasso cells (colloblasts), used for capturing prey.
- Example Pleurobrachia is correct.
- IV - Platyhelminthes (Flame Cells) → Correct
- Platyhelminthes (flatworms) have flame cells, which help in excretion.
- Example Fasciola (liver fluke) is correct.
Examining the given options
- Option 1 (I, II) → Incorrect (Both have incorrect examples).
- Option 2 (II, III) → Incorrect (II is incorrect).
- Option 3 (III, IV) → Correct, as both III and IV are correctly matched.
- Option 4 (I, III) → Incorrect (I is incorrect).
Conclusion
Since the correct matches are Ctenophora with Lasso cells (Pleurobrachia) and Platyhelminthes with Flame cells (Fasciola), the correct answer is Option (3): III, IV.