Tag: botany

Questions Related to botany

Which heterotrophs feed on organic matters, dead plants and animals?

botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

  1. Omnivores

  2. Saprotrophs

  3. Herbivores

  4. Producer

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Correct Option: B

The plant having the largest flower is  

botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

  1. Total stem parasite

  2. Epiphyte

  3. Total root parasite

  4. Partial stem parasite

Show answer
Correct Option: C
Explanation:

The flower with the world's largest bloom is Rafflesia arnoldii. This rare flower is found in the rainforests of Indonesia. It can grow to be 3 feet across and weigh up to 15 pounds. It is a total root parasitic plant, with no visible leaves, roots, or stem. It attaches itself to the roots of host plant to obtain water and nutrients. 

Which of the following is a correct pair?

botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

  1. Cuscuta- Parasite

  2. Dischidia- Insectivorous

  3. Opuntia- Predator

  4. Capsella- Hydrophyte

Show answer
Correct Option: A
Explanation:

1st option is correctly matched as Cuscuta also known as dodder/arambel is a genus of about 100–170 species of yellow, orange, or red parasitic plants. 

2nd option is incorrectly matched as Dischidia is non-insectivorous. They are epiphytes native to tropical areas of China, India and most areas of Indo-China.
3rd option is incorrectly matched as Opuntia is not a predator, it is a genus in the cactus family, Cactaceae. The genus occurs naturally throughout North and South America.
4th option is incorrectly matched as Capsella is not a hydrophyte, it is a genus of herbaceous plant and biennial plants in the mustard family Brassicaceae. 
Therefore, the correct answer is option A.

Organisms that feed upon decaying matter are called as

botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

  1. Heterotrophs

  2. Saprophytes

  3. Myxophytes

  4. Autotrophs

Show answer
Correct Option: B
Explanation:

Depending upon the mode of nutrition the organisms are classified as autotroph and heterotroph. 

The autotrophs can synthesize their own food material from inorganic substances. 
The heterotrophs cannot synthesize their own food material. They have to obtain their food from other organisms. 
Saprophytes are one of the types heterotrophs. They are organisms which derive their food from dead and decayed organisms. 
Therefore, the correct answer is option B.

Which one of the following has a saprophytic mode of nutrition?

botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

  1. Roundworm

  2. Leech

  3. Mushroom

  4. Lice

Show answer
Correct Option: C
Explanation:

The mode of nutrition in which non-green plants take in nutrients in solution form from dead and decaying matter is called saprophytic or saprotrophic nutrition. Fungi, mushrooms, yeast and many bacteria are examples of saprophytes. Roundworms, leeches and lice are parasites, i.e., they live on or in another organism and get their nutrition from them.

Which of the following is a parasitic plant? 

botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

  1. Cactus

  2. Salvia

  3. Cuscuta

  4. Cucumber

Show answer
Correct Option: C
Explanation:
Cuscuta is a parasitic plant. It has no chlorophyll and cannot make its own food by photosynthesis. Instead, it grows on other plants, using their nutrients for its growth and weakening the host plant. Agriculturalists consider cuscuta a destructive weed and attempt to eradicate it. It parasitizes wild and cultivated plants, and is especially destructive to such commercially valuable crops as flax, alfalfa , beans, and potatoes. It also grows on such common ornamentals as English ivy, petunias, dahlias, and Chrysanthemum. 

The organisms obtain nutrients from dead and decaying organic matter from which mode?

botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

  1. Parasite

  2. Autotroph

  3. Saprophytes

  4. Holozoic

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Correct Option: C
Explanation:

Holozoic modes of nutrition is a method of nutrition that involves the ingestion of liquid or solid organic material, digestion, absorption and assimilation of it to utilize it. For example, amoeba. 

Saprophytes are the animals which feed on dead and decaying animals. For example, moulds, mushroom etc. 
Parasitic mode of nutrition is that in which organism feeds on a living organism (host). For example, leach, flatworm,plain worms etc. 
Autotroph is an organism that manufactures its own food from inorganic substances, such as carbon dioxide and ammonia. Most autotrophs, such as green plants, certain algae, and photosynthetic bacteria, use light for energy. 
Therefore, the correct answer is option C.

Few plants cannot synthesise food on their own and depend upon other plants and small animals. They are called as heterotrophic plants. These heterotrophs are classified in

botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

  1. Thallophytes and bryophytes

  2. Saprophytes and parasites

  3. Xerophytes and hydrophytes

  4. Saprophytes and pteridophytes

Show answer
Correct Option: B
Explanation:

Parasite are the organism, which depends upon other organism for its nourishment and growth, is known as parasite. It has intracellular digestion. It causes harm to the organism. 

Saprophyte is an organism, which grows on dead and decaying material for its growth, is known as saprophyte. It shows extracellular digestion. It does not depend on living host. 
Thallophytes, bryophytes, xerophytes, pteridophytes and hydrophytes are autotrophs. 
Therefore, the correct answer is option B.

Symbiotic relationship is called as

botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

  1. Some organisms live together

  2. Share shelter and nutrients

  3. Both A and B

  4. None of the above

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Correct Option: C
Explanation:

Symbiosis is any of several living arrangements between members of two different species, including mutualism, commensalism, and parasitism. Both positive (beneficial) and negative (unfavourable to harmful) associations are therefore included, and the members are called symbionts. Any association between two species populations that live together is symbiotic, whether the species benefit, harm, or have no effect on one another. 

Therefore, the correct answer is option C.

Bread mould gets its food

botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

  1. Through photosynthesis

  2. Non living matter

  3. By eating herbivorous animals

  4. All of the above

Show answer
Correct Option: B
Explanation:

Bread mold (Rhizopus stolonifer) is a widely distributed thread-like mucoralean mold. Commonly found on bread surfaces, it takes food and nutrients from the bread and causes damage to the surface where it lives. Asexual spores are formed within pinhead-like sporangia, which break to release the spores when mature. Germination of these spores forms the haploid hyphae of a new mycelium. R. stolonifer grows rapidly at temperatures between 15 and 30°C. 

Therefore, the correct answer is option B.