Unit notes and practice questions
Everything here is for unit 11 of the Grade 12 Agriculture textbook: what the chapter covers, the short notes, practice questions with their answers, and the lesson video where one exists.
The cards filed under this chapter on the Grade 12 Agriculture page. Open one at a time.
When you use it
Use when explaining the environmental factor that allows multiple honey harvests per year in Ethiopia.
Watch out
Honey can be harvested at least twice a year because of bimodal rainfall patterns that create two separate flowering peaks.
Drafted from Grade 12 Agriculture, pages 201-216, then checked twice before it went up
| Apiculture Indicator | Value |
|---|---|
| Melliferous plant species | > 7000 |
| Wild bee species | 5 |
| Wild colonies in forests and crevices | > 2000000 |
| Annual honey production potential | 500000 tons |
| Annual beeswax production potential | 50000 tons |
| Crops dependent on pollinators | 62.2% (33 of 53 crops) |
| Pollination share of agricultural GDP | 6.24% (0.815 billion USD) |
When you use it
Use when referencing national data on bee flora, colony numbers, yield potentials, and pollination economics in Ethiopia.
Watch out
The pollination economic value of 0.815 billion USD is an indirect ecosystem service, not direct honey revenue.
Drafted from Grade 12 Agriculture, pages 201-216, then checked twice before it went up
| Caste | Sex | Number per Colony | Primary Role |
|---|---|---|---|
| Queen | Female | 1 | Lays all eggs in the colony |
| Drone | Male | Numerous | Mates with queen |
| Worker | Female | 60000 | Maintains colony and gathers resources |
When you use it
Use when identifying the social structure, sex, population, and duties of honey bee castes in a hive.
Watch out
Workers are female but non-reproductive. Only the single queen lays eggs.
Drafted from Grade 12 Agriculture, pages 201-216, then checked twice before it went up
| System | Hive Design | Key Structure and Features |
|---|---|---|
| Traditional | Forest or backyard cylindrical hive | Simple cylindrical log or bark structure, fixed combs |
| Transitional | Top-bar hive | Single-story long box, inward-sloping sidewalls, movable top bars of fixed width |
| Modern | Movable-frame hive (e.g. Langstroth) | Tiered rectangular boxes placed one above the other, seasonally adjustable super frames |
When you use it
Use when comparing traditional, transitional, and modern beekeeping hives and their operational structures.
Watch out
The movable-frame hive was invented by Lorenzo Lorraine Langstroth in 1851.
Drafted from Grade 12 Agriculture, pages 217-225, then checked twice before it went up
When you use it
Use when listing the order of supplementary feeds and identifying correct seasonal colony management practices.
Watch out
Queen excluders must be removed immediately after honey harvest. Supplementary feed priority order is sugar syrup, Shiro flour, barley flour, maize flour, honey, then fafa.
Drafted from Grade 12 Agriculture, pages 217-225, then checked twice before it went up
| Field Indicator | Colony Status |
|---|---|
| Milky color on inserted test stick | Active brood rearing in progress |
| Sweet taste and yellow color on stick | Mature honey ready for harvesting |
| Pollen observed on bee legs | Active brood rearing in progress |
| Bee legs free of pollen | Honey making stage (mature honey present) |
When you use it
Use to distinguish between active brood rearing and harvest-ready mature honey in traditional beekeeping.
Watch out
Harvesting when an inserted stick shows a milky color destroys active broods instead of collecting honey.
Drafted from Grade 12 Agriculture, pages 226-242, then checked twice before it went up
10 multiple-choice questions written against this chapter, each with its answer and the reason. Try one before you open the answer.
Question 1
According to the textbook, how many melliferous plant species exist in Ethiopia?
Answer: A Over 7,000
Why
The text states that there are over 7,000 melliferous plant species in Ethiopia that produce nectar and pollen for bees.
Question 2
Which trophic category includes fish that feed on dead and partially decomposed plants through the action of bacteria and fungi?
Answer: B Detrivorous fish
Why
Detrivorous fish feed on dead and decaying plant matter broken down by bacteria and fungi, and are mostly bottom dwellers (benthos).
Question 3
What is the fish culture technique where only one species of fish is raised in a water body?
Answer: C Monoculture
Why
Monoculture refers to raising only one single species of fish (such as only tilapia or only catfish) in the available water body.
Question 4
What is the local name for the dried fish product commonly produced around Arba-Minch?
Answer: A Quanta
Why
In Ethiopia, dried fish strips prepared by hanging them to dry for two to three days are known locally as Quanta.
Question 5
What is the recommended dissolved oxygen level for best management practice in fish rearing?
Answer: A Around 4 mg/l
Why
Best practice shows that the dissolved oxygen level in rearing ponds should be around 4 mg/l to prevent mass fish death.
Question 6
Which of the following is classified as a passive fishing gear?
Answer: C Gill net
Why
A gill net is stationary passive gear left in place for fish to swim into, whereas trawl, seine, and dredge nets are actively towed through water.
Question 7
Under what water temperature condition does Channel Catfish Virus Disease (CCVD) attack young fish?
Answer: B 25 °C or above
Why
Channel catfish virus attacks swim-up fry to 10 cm fingerlings when water temperatures reach 25 °C or above.
Question 8
Out of the 53 major crops cultivated in Ethiopia, how many depend on biological pollinators like honey bees?
Answer: C 33 crops (62.2%)
Why
The textbook notes that 33 out of 53 significant crops in Ethiopia (62.2%) depend directly on biological pollinators.
Question 9
Which digestive tract feature is characteristic of herbivorous fish species?
Answer: A Large intestine and a small stomach
Why
Herbivorous fishes have a delicate, less acidic stomach that is small in size, combined with a large intestine to process plant materials.
Question 10
In fish processing and preservation, what parameter is being controlled when acids are added?
Answer: B Chemical control of microbes (pH)
Why
Adding acids lowers the pH, which serves as a chemical control method against spoilage microorganisms.
The app holds 21 questions on this unit, marked as you go. These are the first 10.
Unit 11 runs from page 210 to page 225 of the Ministry of Education edition.
Ministry of Education edition, English, 302 pages
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