Tag: know the plant world closely

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Questions Related to know the plant world closely

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

Which of the following is a parasitic plant? 

  1. Cactus

  2. Salvia

  3. Cuscuta

  4. Cucumber
Reveal answer Fill a bubble to check yourself
C Correct answer
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. 
Multiple choice botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

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

  1. Parasite

  2. Autotroph

  3. Saprophytes

  4. Holozoic
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

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

  1. Thallophytes and bryophytes

  2. Saprophytes and parasites

  3. Xerophytes and hydrophytes

  4. Saprophytes and pteridophytes
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

Symbiotic relationship is called as

  1. Some organisms live together

  2. Share shelter and nutrients

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Bread mould gets its food

  1. Through photosynthesis

  2. Non living matter

  3. By eating herbivorous animals

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

.......... are good sources of oxygen for those organisms that live in water.

  1. Moss

  2. Mushroom

  3. Sea urchin

  4. Algae
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Like all green plants, algae produce oxygen during the daylight hours as a by-product of photosynthesis. This is usually a major source of oxygen in fish ponds. In darkness, however, all plants consume oxygen, including algae. Algae blooms in natural water bodies or fish ponds normally produce much more oxygen in the daylight than they consume during the night, but some situations reduce the amount of oxygen a bloom produces without reducing its nighttime oxygen consumption. Trace minerals or nutrients needed by the algae are occasionally used up, causing some or even all, of the bloom to die back temporarily. The resulting bacterial decomposition and loss of normal oxygen production can lead to oxygen depletions and fish kills. Pond water generally changes from a deep green to black, gray, brown or clear after a phytoplankton die-off. 

Therefore, the correct answer is option D.

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

We can demarcate a facultative parasite as one which

  1. Inevitably requires living host.

  2. Only requires dead organic matter to live.

  3. Is actually a parasite but can also become saprophyte.

  4. Is actually a saprophyte but can also become a parasite.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Facultative parasites are organisms which do not completely depend on a host for completing its life cycle, but may become parasitic in absence of food or other favorable conditions

Example: Armillaria species
So, the correct answer is 'Is actually a saprophyte but can also become a parasite'

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

Cuscuta is

  1. Total root parasites

  2. Total stem parasites

  3. Partial stem parasites

  4. Epiphytes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cuscuta (Doddar) plant is obligate or total stem parasite. It completely lacks chlorophyll and has no connection with the soil after the seeding stage. Therefore it is totally dependent on the host for organic food materials and supply of water and minerals salts.

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

Animals living and subsisting on other animals are studied under

  1. Pathology

  2. Parasitology

  3. Parazoology

  4. Protozoology
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

a) Pathology deals with the study of the nature and causes of diseases. 

b) Parasitology deals with the study of parasitic organism.
c) Parazoology deals with the study of animals known as parazoa.
d) Protozoology deals with the study of protozoa.
So, the correct answer is 'Parasitology'.