Question

The mode of nutrition in euglenoids is:

• A. Heterotrophic
• B. Autotrophic
• C. Mixotrophic
• D. Symbiotic

Answer 1

The correct option is C

Mixotrophic

The correct option is C.

Explanation of the correct option:

1. Euglenoids are flagellate unicellular protists that live in water or damp soil. Freshwater creatures located in stagnant water make up the majority of them.
2. The spindle-shaped euglenoid body has a blunt front end and a pointed posterior end.
3. Euglenoids are flagellate protists that are both chlorophyllous and non-chlorophyllous. Euglena is the largest of these taxa. Euglena's nutrition is photoautotrophic.
4. In the absence of light, it can obtain nutrition from dead and decaying organic matter in the substrate by secreting digestive enzymes (saprophytic feeding).
5. Euglena lacks this dual mode of nourishment. Some are holozoic (Peranema) and others are saprobic (Rhabdomonas).

Explanation of the incorrect options:

Option A:

1. A heterotroph is an organism that obtains energy and nutrients by eating other plants or animals.
2. The name comes from the Greek terms hetero, which means "other," and trophe, which means “nutrition.”
3. Autotrophs and heterotrophs are two main groups of organisms based on how they obtain energy and nutrients.

Option B:

1. An autotroph is a living entity capable of producing its own sustenance from light, water, carbon dioxide, or other molecules.
2. Autotrophs are also known as producers since they make their own nourishment.
3. Although plants are the most well-known autotroph, there are numerous more types of autotrophic creatures.

Option D:

1. Mutualistic, commensalism or parasitic symbiosis is any sort of close and long-term biological contact between two separate biological entities.
2. Each symbiont, or group of organisms, must be of a separate species.

Final Answer: - The mode of nutrition in euglenoids is Mixotrophic.