Question

Ecological or physiological races are also known as

• A. Ecads
• B. Ecotone
• C. Ecophens
• D. Ecotypes

Hint:

Ecotype = Exactly different Genes. (Genetic).
Ecad = Appearance Difference only. (Environmental).
Ecotypes are the first step toward the formation of new species!

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
The question asks for the technical ecological term used to describe populations of a species that have evolved genetic adaptations to a specific environment.
Detailed Explanation:

• Definition of Ecotype:
An ecotype is a genetically distinct geographic variety, population, or race within a species, which is adapted to specific environmental conditions.
The differences between ecotypes are inheritable (genetic). If you move an ecotype to a different environment, it will still retain its unique characteristics.

• Ecads/Ecophens (Statement A and C):
These are "phenotypic" variants. They look different because of the environment, but their genes are the same. This is called plasticity. If you move an ecad back to its original home, its appearance will change back.

• Ecotone (Statement B):
This is a geographic term. An ecotone is a transition zone between two different ecosystems (e.g., the edge between a forest and a grassland). It is not a "race" of an organism.

• Concept Origin:
The concept of ecotypes was pioneered by Göte Turesson in the $1920$s to explain how species adapt locally to soil types, light levels, or climates.

Step 2: Final Answer:
Genetic ecological or physiological races are technically known as Ecotypes.