THE SPECIMENS PROVIDED
GROUP I
SPECIMEN A: Water Lettuce
SPECIMEN B: Cactus Plant
SPECIMEN C: Amaranthus spp / Talinum spp
GROUP III
SPECIMEN H: Lungs of mammal
SPECIMEN J: Toad/Frog
SPECIMEN K: Maize leaf
CONCEPTION OF THE SPECIMENS
SPECIMEN A: WATER LETTUCE (Hydrophytes)
- Habitat: Aquatic
- Class: Angiosperm (flowering plant)
- Mode of nutrition: Autotrophic (photosynthesis)
- Mode of reproduction: Asexual (vegetative propagation)
- Structure for reproduction: Stolon
OBSERVABLE FEATURE
- it has stolon
- it has thin cuticle on the leaves
- it has air storage tissues
- it has fibrous/adventitious root
- it has green leaves
- it has tiny hairs on leaves
STRUCTURAL ADAPTIVE FEATURES
- Possession of light body for floating
- Presence of tissues with air space and spongy tissues for flotation
- Presence of hairy adventitious/fibrous root for water absorption and gaseous exchange
- Possession of stolon which connects whorls of plants together and for vegetative propagation
- Swollen leaf for buoyancy
- Air storage tissues for buoyancy
- Presence of whorls of spongy leaves for floatation
- Stomata on upper surface of leaves for transpiration and gaseous exchange
- Presence of waxy thin cuticle which prevents wetting of the leaves
- Possession of tiny hairs on leaves which repel water
- Poorly developed strengthening tissues which makes it flexible and able to withstand wave action
- Presence of poorly developed conducting tissues
- Possession of chloroplast for photosynthesis
- Possession of air bladder for buoyancy
CHARACTERISTICS OF SPECIMEN A HABITAT
- It has a fluctuating salt content
- The soil is saturated and lack oxygen
- The soil is readily washed away by the sea
ECOLOGICAL FACTORS FOR SPECIMEN A HABITAT
The factors that affect Specimen A in its habitat are as follows:
- Water current
- Water density and viscosity
- Depth of water
- Salinity
- Dissolved oxygen
- Light intensity
