Plant Tissues, Organs And Systems
Muhtasari
A leaf is a few tenths of a millimetre thick and has to do three incompatible things at once: catch as much light as possible, let carbon dioxide in, and avoid drying out in the sun that provides the light. The way it is layered is the compromise, and every layer is there for a reason you can work out.
In this lesson you will name the plant tissues the specification asks for, slice through a leaf and account for each layer, and learn where xylem and phloem sit in a root and in a stem. That last detail is small, easily forgotten and reliably examined.
Malengo
- Examples of plant tissues include: epidermal tissues, which cover the plant; palisade mesophyll, which carries out photosynthesis; spongy mesophyll, which has air spaces to facilitate diffusion of gases; xylem and phloem, which transport substances around the plant.
- Plant organs include stems, roots and leaves. Details of the internal structure of these organs are limited to the leaf and to the position of the xylem and phloem in a dicotyledonous primary root and primary stem.
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Maelezo ya Somo
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Tathmini ya Somo
Hongera kwa kukamilisha somo la Plant Tissues, Organs And Systems. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- Which plant tissue carries out most of the photosynthesis in a leaf? A. Epidermal tissue B. Palisade mesophyll C. Spongy mesophyll D. Phloem Answer: B
- What is the function of the air spaces in the spongy mesophyll? A. To store water B. To strengthen the leaf C. To facilitate the diffusion of gases D. To absorb light energy Answer: C
- Which tissue transports water and mineral ions from the roots? A. Phloem B. Xylem C. Palisade mesophyll D. Epidermal tissue Answer: B
- Where are the xylem and phloem found in a dicotyledonous primary root? A. In a ring near the outside B. In the centre C. Just below the epidermis D. Scattered throughout Answer: B
- Which of these is a plant organ? A. Palisade mesophyll B. Xylem C. A leaf D. A chloroplast Answer: C
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