Question

Based on development stage, tissue can be ________.

• A. Apical and Intercalary meristems
• B. Meristematic and permanent
• C. Primary and Secondary meristem
• D. Apical, Intercalary and Lateral

Hint:

Think of Meristematic cells as versatile "stem cells" in an active state of training, and Permanent cells as graduated professionals fixed in their permanent career paths.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Plants grow through continuous cellular differentiation phases, changing their tissues from an active dividing state to a fixed functional state.

Step 2: Detailed Explanation:
When looking at the broad developmental lifecycle of a plant, its tissues are classified into two main structural stages:
• Meristematic Tissues: The early developmental stage consisting of young, immature cells that retain the continuous capacity for active cell division.
• Permanent Tissues: The mature developmental stage derived from meristems. These cells have lost their ability to divide and have taken up a specific, permanent shape, size, and physiological function. Options A, C, and D are subclassifications based on position or origin, not general developmental growth stages.

Step 3: Final Answer:
Based on the developmental stage, tissues are classified as meristematic and permanent.

Answer 2

The question asks specifically for a classification based on developmental stage, so we need to check which option actually reflects a "stage" of development (young vs. mature) rather than a classification based on position or origin within the plant.

1. Apical and Intercalary meristems: these are two positional categories of meristem, defined by where they are located in the plant (tip versus base of internodes), not by developmental stage, so this does not answer the "based on development" criterion.
2. Meristematic and permanent: this pair directly reflects developmental stage, meristematic tissue being the young, actively dividing stage, and permanent tissue being the mature stage the cells settle into once division stops and differentiation is complete. This is precisely a two-stage developmental classification.
3. Primary and Secondary meristem: this distinction is based on the timing of origin during a plant's growth (whether the meristem forms early, from embryonic tissue, or later from mature cells) and is really a sub-classification within meristematic tissue itself, not the broad developmental grouping the question asks for.
4. Apical, Intercalary and Lateral: like option A, this is a position-based classification (three categories by location) of meristematic tissue, not a stage-based classification covering the whole plant body.

Only one option describes tissue purely in terms of an early, dividing stage versus a later, mature stage.

Therefore, the correct answer is Meristematic and permanent.