Study the Diagrams Below and use them to Answer the Questions That Follow “a to i”.
Study the Diagrams Below and use them to Answer the Questions That Follow “a to i”.
a) Identify the leaf arrangements in diagrams H, J, and M.
Answer:
- Specimen H: Alternate
- Specimen J: Whorled
- Specimen M: Opposite/Decussate
b) Give one example each of plants that have the leaf arrangements in H, J, and M.
Answer:
Examples of alternate leaf arrangement (Specimen H)
- Talinum,
- Crotalaria,
- Bougainvillea,
- Mango
- Hibiscus
Examples of whorled leaf arrangement (Specimen J)
- Allamanda
Examples of opposite leaf Arrangement (Specimen M)
- Ixora,
- Guava,
- white mangrove
c) Name the leaf shape in diagrams N, P, Q, and R.
Answer:
- Specimen N: Palmate
- Specimen P: Linear
- Specimen Q: Cordate
- Specimen R: Digitate
d) Give one example each of the plants that possess the leaf shapes in (c) above.
Answer:
Examples of plants with palmate leaves
- Pawpaw,
- Cotton,
- Okro,
- watermelon,
- castor oil,
- Jathropha,
- sweet potato,
Examples of plants with linear leaves
- Maize,
- Guinea grass,
- elephant grass
Examples of plants with cordate leaves
- Hibiscus,
- Yam
Examples of plants with digitate leaves
- Cassava,
- silk cotton
e) Name the parts labelled I to VI.
Answer:
- I: Apex
- II: Margin
- III: Midrib
- IV: Blade/Lamina
- V: Leaf stalk/petiole
- VI: Leaflet
f) State one function of the part labelled V
Answer:
- It supports the leaf
g) Name the type of leaf in G with a reason.
Answer:
- Type of leaf in G is Pinnate
Reason:
- The leaf blade is divided into several leaflets, which are arranged along the main stalk
h) State two features of the leaf in K that adapt it to its functions.
Answer:
- The leaf blade is broad and flat to provide a large surface area for maximum absorption of sunlight and carbon dioxide
- An extensive network of veins is a transport system that brings water to the leaf and also removes products of photosynthesis.
i) State the classes of the leaves in P and Q with reasons.
Answer:
P: Class Monocotyledoneae
Reasons:
- Presence of parallel venation
- Presence of leaf sheath
- The leaf is narrow
Q: Class Dicotyledoneae
Reasons:
- Presence of net venation
- Presence of leaf stalk
- The leaf is broad.
