Given below are names of the animals in column X and the accessory respiratory organs in teleost fishes (column Y). Column X Column Y A Anabas (i) Labyrinthine organ B Clarias (ii) Air sacs C Amphipnous (iii) Supra branchial cavity D Channa (iv) Arborescent organ The correct match of the animals with the accessory respiratory organs they have are:
Many teleost fishes have developed special structures called accessory respiratory organs that allow them to breathe atmospheric air. These organs are particularly useful for survival in environments with low oxygen levels or for brief periods out of water. The question asks us to match specific fish species from Column X with their corresponding accessory respiratory organs listed in Column Y.
Accessory Respiratory Organs in Teleost Fish
Let's look at the accessory respiratory organ present in each fish listed:
- Anabas (Climbing Perch): This fish possesses a labyrinthine organ, which is a highly folded structure located in a chamber above the gills. It is adapted for breathing air.
- Clarias (Catfish): Different species of Clarias have various accessory organs, including the arborescent organ, which are tree-like structures derived from gill arches, found in the supra branchial chamber. These are efficient for aerial respiration.
- Amphipnous (Swamp Eel): This fish primarily relies on air sacs (or lung-like structures) that extend from the gill chamber or pharynx for breathing air, especially when the water quality is poor or during periods out of water.
- Channa (Snakehead): Channa species have a large supra branchial cavity lined with respiratory epithelium. This cavity allows them to take in air directly from the atmosphere.
Matching Fish and Organs
Based on the above information, we can create the correct matches between Column X and Column Y:
| Column X (Animal) | Column Y (Accessory Respiratory Organ) | Match |
|---|---|---|
| A - Anabas | (i) Labyrinthine organ | A - i |
| B - Clarias | (iv) Arborescent organ | B - iv |
| C - Amphipnous | (ii) Air sacs | C - ii |
| D - Channa | (iii) Supra branchial cavity | D - iii |
So, the correct matching is A - i, B - iv, C - ii, D - iii.
Important Questions from Diversity of Life Forms
The following table shows common millets (Column X) and their scientific names (Column Y):
Column X
Column Y
A.
Ragi (Finger millet)
i.
Eleusine coracana
B.
Jowar (Great millet)
ii.
Paspalum scrobiculatum
C.
Kodo millet
iii.
Pennisetum typhoides/ glaucum
D.
Bajra (Pearl millet)
iv.
Sorghum bicolor
Which one of the following options represents the correct match between Column X and Column Y?
Which one of the following fossils is no longer considered to be a true vascular plant based on the structure of the secondary thickening of the conducting elements?
Select the correct former name for The International Code of Nomenclature (ICN) which was changed as part of the Melbourne code.
Based on the reported estimates of biodiversity in India, select the correct option that represents the decreasing order of total number of species reported in these taxa.
Select the rare or endangered species which also have exceptionally low genetic variability, as documented by multi-locus molecular methods.
