Biology miscellaneous
- One of the following excretes uric acid as its excretory product :
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Sparrow excretes uric acid as its excretory product.
Correct Option: C
Sparrow excretes uric acid as its excretory product.
- Who among the following have venous heart?
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There are over 20,000 species of fish, divided into three groups : bony fish, cartilaginous fish and jawless fish. Bony fish, which are the most numerous, have skeletons, of bone, and swimbladders (gas-filled organs) to keep them afloat. Cartilaginous fish, such as sharks, rays and ratfish, are mostly marine hunters; they have skeletons made of cartilage and sandpaper-like skin. The primitive jawless fish have sucker-like mouths, and include lampreys and hagfish.
Correct Option: C
There are over 20,000 species of fish, divided into three groups : bony fish, cartilaginous fish and jawless fish. Bony fish, which are the most numerous, have skeletons, of bone, and swimbladders (gas-filled organs) to keep them afloat. Cartilaginous fish, such as sharks, rays and ratfish, are mostly marine hunters; they have skeletons made of cartilage and sandpaper-like skin. The primitive jawless fish have sucker-like mouths, and include lampreys and hagfish.
- Potential of air pollution increases when the ventilation coefficient is
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The product of the maximum mixing depth and the average wind speed within the mixing depth is sometimes used as an indicator of the atmosphere’s dispersive capability. This product is known as the ventilation coefficient (m2/s). Values of ventilation coefficient less than about 6000 m2/s are considered indicative of high air pollution potential (Portelli and Lewis, 1987).
Correct Option: D
The product of the maximum mixing depth and the average wind speed within the mixing depth is sometimes used as an indicator of the atmosphere’s dispersive capability. This product is known as the ventilation coefficient (m2/s). Values of ventilation coefficient less than about 6000 m2/s are considered indicative of high air pollution potential (Portelli and Lewis, 1987).
- Seed dormancy is regulatedby
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The transition from dormancy to germination in seeds is a key physiological process during the lifecycle of plants. Abscisic acid (ABA) is the sole plant hormone known to maintain seed dormancy. It acts through a gene expression network involving the transcription factor ABSCISIC ACID INSENSITIVE 3 (ABI3).
Correct Option: A
The transition from dormancy to germination in seeds is a key physiological process during the lifecycle of plants. Abscisic acid (ABA) is the sole plant hormone known to maintain seed dormancy. It acts through a gene expression network involving the transcription factor ABSCISIC ACID INSENSITIVE 3 (ABI3).
- Which of the following is an insectivorous plant ?
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An insectivorous plant, also called a carnivorous plant, captures prey items, such as insects, spiders, crustaceans, mites, and protozoans, as a nitrogen source. Aldrovanda, Dionaea, Drosera, Drosophyllum, etc are some of them under the Droseraceae family.
Correct Option: D
An insectivorous plant, also called a carnivorous plant, captures prey items, such as insects, spiders, crustaceans, mites, and protozoans, as a nitrogen source. Aldrovanda, Dionaea, Drosera, Drosophyllum, etc are some of them under the Droseraceae family.