ANATOMY OF FLOWERING PLANTS in 1 Shot: All Concepts, Tricks & PYQs | NEET Crash Course | Ummeed
Competition Wallah・2 minutes read
The chapter "Anat Off Flowering Plant" has been simplified in the new syllabus, covering xylem, phloem, tissue types, primary and permanent tissues, guard cells, and secondary growth of plants. Understanding the structures of xylem, phloem, roots, stems, and leaves in dicot and monocot plants is crucial for grasping plant growth and development.
Insights
- The chapter on plant anatomy has been simplified in the new syllabus, emphasizing xylem, phloem, secondary growth, and tissue types.
- Meristematic tissue consists of actively dividing cells at root and shoot tips, leading to continuous root and stem growth.
- Permanent tissue cells do not divide and transition from meristematic tissue, with examples like parenchyma containing chloroplasts for photosynthesis.
- Xylem and phloem are complex permanent tissues crucial for water transport, with vessels in xylem conducting water and lignin deposition aiding in their function.
Get key ideas from YouTube videos. It’s free
Recent questions
What are the main components of xylem and phloem tissues?
Xylem carries water and consists of tracheids and vessels, while phloem transports organic nutrients and is composed of sieve tubes and companion cells. Tracheids and vessels function as water-conducting cells in xylem, with lignin deposition crucial for water transport. Sieve tubes in phloem facilitate the movement of sugars and other organic compounds, aided by companion cells that support metabolic functions.
How do guard cells regulate stomatal opening and closing?
Guard cells control stomatal opening and closing by responding to changes in turgor pressure. When water enters the guard cells, they swell, leading to stomatal pore opening for gas exchange and transpiration. Conversely, water exiting the guard cells causes them to shrink, resulting in stomatal closure to prevent excessive water loss. The kidney or bean shape of guard cells, along with the presence of chloroplasts in the inner wall, contributes to their functionality in regulating stomatal movements.
What is the difference between primary xylem and secondary xylem?
Primary xylem forms during primary growth and consists of protoxylem and metaxylem cells, with protoxylem developing first and metaxylem later. In contrast, secondary xylem forms during secondary growth from vascular cambium, containing tracheids and vessels for water transport. Protoxylem vessels have narrow structures with more lignin, while metaxylem vessels are broader with less lignin. Understanding the distinction between primary and secondary xylem is essential for comprehending plant growth processes.
How do dicot and monocot stems differ in vascular bundle arrangement?
Dicot stems typically exhibit vascular bundles in a ring form with a well-developed center, while monocot stems showcase scattered vascular bundles with smaller sizes and fewer numbers. The arrangement of vascular bundles in dicot stems aids in structural support and nutrient transport, while the scattered pattern in monocot stems reflects their evolutionary adaptation. Understanding these differences in vascular bundle arrangement is crucial for distinguishing between dicot and monocot plant structures.
What are the key characteristics of dicot and monocot leaves?
Dicot leaves have distinct upper and lower epidermis, with more chloroplasts on the lower surface and stomata primarily on the lower epidermis. The mesophyll in dicot leaves is divided into palisade and spongy parenchyma, contributing to photosynthesis and gas exchange. In contrast, monocot leaves feature parallel venation with equal-sized vascular bundles and bulliform cells that aid in water storage during dry conditions. Recognizing the unique features of dicot and monocot leaves is essential for understanding their physiological functions and adaptations.
Related videos
Unacademy NEET Toppers
Morphology of Flowering Plants in 30 Minutes with Tricks | 16 marks पक्के | NEET 2023 | Gargi Singh
BEAT d NEET
Class11 Ch6 Anatomy of Flowering Plants NCERT Biology(Reading Only)| BiologyClass11AudioBooks|NCERT
Competition Wallah
ANATOMY OF FLOWERING PLANTS in 120 minutes || Complete Chapter for NEET
YAKEEN
ANATOMY OF FLOWERING PLANTS in 1 Shot: FULL CHAPTER COVERAGE (Theory+PYQs) || Prachand NEET
English World
Morphology of Flowering Plants Class 11 | Biology | For NEET | Full Revision In 20 Minutes