Study specimens H and J and answer questions 2(a) to 2(d).
(a)i) Name the Kingdom and Class of organisms from which specimen H could be obtained.
(ii) Name the specific location on the body of the organism from which specimen H could be obtained.
(iii) Name one example of organism from which specimen H could be obtained.
(d) Mention: (i) three observable features that adapt specimen H to the function stated against it in 2(c);
(i) two observable features that adapt specimen J to the function stated against it in 2(c).
(a)
i)
Kingdom and Class of Organism from which Specimen H (quill feather) could be Obtained:
Kingdom -->Animalia
Class --> Aves
(ii)
Location on the Body of Organism from which Specimen H (quill feather) could be Obtained: Wing (s) or tail(s).
(iii)
Example of Organism from which Specimen H (quill feather) could be Obtained Chicken, pigeon, domestic fowl, cock, hen, vulture, ostrich, duck, gull.
(b)
(i) Differences between Specimens H & J:
| Specimen H |
Specimen J/Palm frond |
Barbs present |
Barbs are absent |
Vanes present |
Vanes are absent |
Vein absent |
Vein present |
Shaft/rachis present |
Shaft/rachis absent |
Midrib absent |
Midrib present |
Petiole absent |
Petiole present |
Smaller in size |
Larger in size |
Sharp margin absent |
Sharp margin present |
Non-green in colour |
Green in colour |
Barbules present |
Barbules absent |
Calamus present |
Calamus absent |
Inferior/superior umbilicus present |
Inferior/superior umbilicus absent |
Aftershaft present |
Aftershaft absent |
Barbs are diagonal |
Venation is parallel |
|
|
ii)
Similarities between Specimen and J:
- They both possess point attachment; they both posses apex
- They both have margin
- Both have glossy surface.
(c)
Functions of specimen H (quill feather) and Specimen J (palm frond) to the organism that posses them
Specimen H:
-Flight/flying
- Insulation
-Camouflage
- Sexual / courtship display
- Protection
- Waterproof
- Gives shape.
Specimen J: Photosynthesis manufacture of food /transpiration. gaseous exchange.
(d)
Observable Features that Adapt Specimens H and J to their Functions:
Specimen H (quill feather):
- Strong and firm, to beat against air/wind/protection/insulation
-Hollow shaft / rachis/light weight; for buoyancy
- Interlocking barbules/closely packed barbs for upthrust, color for camouflage
- Courtship display/identification
- Glossy surface for waterproof.
Specimen J (Palm frond):
- Green colour for photosynthesis
- Veins; for conduct / transport of water/nutrient / food
- Glossy/waxy surface; makes it waterproof.
