What is the primary characteristic of a plant with two types of roots that is not a parasite, as mentioned in the document?
It is an epiphyte.
— Concept: This question tests the understanding of different plant types based on their habitat and root modifications,…Concept: This question tests the understanding of different plant types based on their habitat and root modifications, specifically focusing on non-parasitic plants with specialized root systems.
Why (C) is correct: An epiphyte is a plant that grows on another plant (its host) but is not parasitic. They develop two types of roots: clinging roots to attach themselves to the host and aerial roots (often with a velamen) to absorb moisture and nutrients directly from the atmosphere. This fits the description of a non-parasitic plant with two types of roots.
Why other options are wrong:
- (A) It is a hydrophyte: Hydrophytes are aquatic plants, typically having roots adapted for water or mud, not two distinct types for attachment and atmospheric absorption.
- (B) It is a saprophyte: Saprophytes obtain nutrients from dead organic matter and usually have mycorrhizal associations or specialized rhizoids, not two distinct root types for attachment to a living host.
- (D) It is a halophyte: Halophytes are salt-tolerant plants, often found in saline environments, and may have specialized roots (e.g., pneumatophores) but not typically two types for epiphytic growth.
NEET Tip: Remember that epiphytes are 'air plants' that use other plants for support but do not harm them, distinguishing them from parasites. The presence of velamen roots is a key characteristic of many epiphytic orchids.
Correct Answer: (C)
It is an epiphyte.