Biology Practice Question and Answer
8 Q: Sponges belong to phylum ______ of the animal kingdom.
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64c2509e9e9013486a756bb1- 1Echinodermatafalse
- 2Poriferatrue
- 3Aschelminthesfalse
- 4Molluscafalse
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Answer : 2. "Porifera"
Explanation :
1. Sponge belongs to Porifera phylum of the animal kingdom.
2. These are primitive multicellular animals. The study of sponges is known as para zoology.
3. Sponges are mostly irregular in shape and have radial symmetry.
4. The body of a sponge has two layers-
- Epidermis: This is the outer layer that helps move water in and out.
- Mesohyl: This is the middle layer which contains the cells of the sponge.
Q: Which of the following statements about bryophytes is not true?
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64c22dd629beb3482a35656e- 1They are called amphibians of the plant kingdom.false
- 2The presence of a special tissue is found in these for the flow offalse
- 3water and other substances from one part of the plant body to another. Their body is generally differentiated by taking the form of stem and leaf-like structures.true
- 4Moss (Funaria) and Marchantia are examples of bryophytes.false
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Answer : 3. "water and other substances from one part of the plant body to another. Their body is generally differentiated by taking the form of stem and leaf-like structures. "
Explanation :
All the given statements about bryophytes are true.
1. They are called amphibians of the plant kingdom.
2. The presence of a special tissue is found in these for the flow of
3. Moss (Funaria) and Marchantia are examples of bryophytes.
Q: Starch and sugar in our food are forms of _____.
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64c22ce196ae1f4842ff082d- 1Proteinsfalse
- 2fatsfalse
- 3vitaminsfalse
- 4carbohydratestrue
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Answer : 4. "carbohydrates"
Explanation :
1. Starch and sugar found in our food are forms of carbohydrates. Carbohydrates are an important part of our diet. They provide energy to the body and are essential for other body functions.
2. Starch is a complex carbohydrate found in plants. It is found in wheat, rice, potatoes, and other grains. Starch is used to thicken food, make sugar, and make other foods.
Q: Which of the following fall under Phylum Cnidarian of the animal kingdom?
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64c2210496ae1f4842fecb82- 1Sea urchinsfalse
- 2Earthwormsfalse
- 3Snailsfalse
- 4Coralstrue
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Answer : 4. "Corals"
Explanation :
1. Coral comes under the Cnidarian phylum of the animal kingdom.
2. Coral, also known as Coral and Mirajan, is a type of tiny sea creatures that live in groups numbering millions.
3. Coral, also known as Coral and Mirajan, is a type of tiny sea creature that lives in groups numbering millions.
Q: Who among the following developed the Cholera vaccine in 1885?
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64c21aa1a919c8488e0cbe42- 1Edward Jennerfalse
- 2Jaime Ferrántrue
- 3Jonas Salkfalse
- 4Leon Calmettefalse
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Answer : 2. "Jaime Ferrán"
Explanation :
1. The credit for developing the cholera vaccine in 1885 goes to Spanish-French bacteriologist and hygienist Jaime Ferrán.
2. He tested a live attenuated bacterial vaccine during a cholera epidemic in Valencia.
3. Jaime Ferrán's vaccine successfully protected people from cholera and began to be used in vaccination programs around the world.
Q: Nyctalopia, more commonly known as Night Blindness, is caused by the deficiency of which nutrient?
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64bfc7da2d3130f575545330- 1Vitamin Cfalse
- 2Magnesiumfalse
- 3Potassiumfalse
- 4Vitamin Atrue
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Answer : 4. "Vitamin A"
Explanation :
1. Nyctalopia (night blindness) is caused by deficiency of Vitamin A.
2. Foods rich in Vitamin A are carrots, spinach, sweet potatoes, lettuce, etc.
3. Vitamin A deficiency can cause damage to rod cells, which reduces the ability to see in low light.
Q: Which of the following is essential to form haemoglobin in blood?
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64b5261788d5e4f52dd23643- 1Fatsfalse
- 2Irontrue
- 3Calciumfalse
- 4Proteinfalse
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Answer : 2. "Iron"
Explanation :
1. Iron is required for the formation of hemoglobin.
2. Hemoglobin is a part of red blood cells that carries oxygen and removes carbon dioxide (a waste product) from the body.
3. Iron is stored in the body mainly in hemoglobin.
Q: Which of the following can degrade detritus into simpler inorganic substances?
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64b5267c36fc1bf576512523- 1Algaefalse
- 2Phytoplanktonfalse
- 3Fungal enzymestrue
- 4Lichensfalse
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Answer : 3. "Fungal enzymes"
Explanation :
1. Fungal enzymes decompose simple inorganic substances.
2. Fungi are a type of microorganisms that decompose organic matter.
3. Enzymes break down organic matter into smaller molecules, which can then be used by the body of the fungus.