Correct Answer: D. Precipitation

Correct Answer: C) contractile vacuole

Explanation

In amoebas, osmoregulation is the process of regulating the water content within the cell. This is important because if too much water enters the cell, it can burst, and if too much water leaves the cell, it can shrivel up and die. The correct answer to this question is option C - contractile vacuole. The contractile vacuole is a structure found in many single-celled organisms, including amoebas. It acts like a pump, expelling excess water from the cell and regulating the water balance. When water enters the cell, it collects in the contractile vacuole and is then expelled through a pore in the cell membrane. This process helps to maintain a stable internal environment for the amoeba and prevents it from bursting due to excess water. The other options listed in this question are not involved in osmoregulation. Pseudopodia are extensions of the cell membrane that amoebas use for movement and feeding, while the food vacuole is where food is stored and digested. The nucleus is the control center of the cell, containing genetic information and controlling cell functions, but it is not involved in osmoregulation. Overall, contractile vacuoles are important structures in amoebas that help to regulate the water content within the cell and prevent it from bursting or shriveling up

Correct Answer: B. on

Explanation

(a)(i) Definition of culling in poultry production: Culling is the removal of diseased or poorly performing or destructive birds from a flock.

(ii) Benefits derived from culling:

-The incidence and spread of poultry diseases is minimized.

-The incidence and spread of poultry pests is minimized.

-The extra cost of feeding unproductive birds is eliminated.

-A larger floor space is available for the rest of the birds.

-Egg pecking is minimized.

-Cannibalism is minimized.

-Hen-day production percentage is increased.

(b) Ways of preventing diseases in a sheep flock

-The house should be cleaned and washed at intervals.

- The bedding materials including the feaces and urine should be removed at intervals.

-The sick animals should be culled.

-Sick animals should be separated and treated.

-There must be regular dipping of the animals against ecto-parasites

-Sheep should be dewormed at intervals with appropriate antihelmintics.

-The feeding trough and water trough should be properly cleaned.

- Sheep should be vaccinated against common diseases/use of prophylactic drugs.

- All animals being introduced should be quarantined.

-Foot baths should be provided.

-Bury dead animals.

-Feed animals with balanced diet.

(c) Paddocking as a way of improving rangeland

- Entails partitioning of rangedland with fences into small plots.

-Animals graze in each partition/paddock by rotation.

-Paddocking allows regeneration of forage crops. It prevents build-up of pests.

-It prevents selective grazing of grasses and legumes.

-It prevents build-up of diseases.

(d) Fishery regulations

- Prohibition of dumping of toxic materials/industrial wastes in fishing areas or water.

- Prohibition of the use of chemicals in fishing.

- Certification that fishes to be sold to the public safe for human consumption.

- Forbids the killing of endangered aquatic animals.

- Protection of territorial waters of various nations.

- Mesh size regulation enforcement to protect immature fishes.

- Catch quota regulation which limit the quantity a fisherman can harvest.

-Prohibition of the use of explosives,

-Enforcement of close season regulation

- Electro-fishing is outlawed except for research purposes

Explanation

Revelation of Quran

Holy Quran was revealed to last Prophet Muhammad (SAW) in the form of wahi. In Islamic terminology, wahi can be literally defined as "Allah's divine message conveyed to Allah's chosen persons (Prophets)." Descriptions of wahi are also given in the Holy Quran:

"So we sent this inspiration to the mother of Musa." (Quran, 28:7).

"This is part of the tidings of the unseen which we reveal unto thee (oh Prophet) by inspiration". (Quran, 3:44)

Quran revealed in form of Wahi which was made open to Prophet Muhammad (SAW) by Allah Almighty in different forms, either during sleep, while awake, with imprint on His heart, or Gabriel brought the verses in his original or humanly forms from time to time.

The process of revelation of Quran started in the month of Ramadan as Allah (SWT) mentioned in Quran: "Ramadan is the (month) in which we sent down the Quran." (Quran, 2:185)

The Quran was not revealed in one instance but through a gradual process with small numbers of Ayahs revealed at any one time. Allah Almighty also explains the reason behind the in-parts revelation of Quran over a period of 23 years. Allah says in Quran:

"(It is) a Quran which we have divided (into parts from time to time), in order that thou mightiest recite it to men. At intervals we have revealed it by stages." (Quran, 17:106)

Hence there was a step by step process of revelation where the verses were revealed at specific instances to Prophet Muhammad (SAW) making it easy to circulate and propagate the information to the followers of Islam. So the divine message of Allah (SWT) was revealed slowly to allow the new Muslim Arabs to change and accept the new faith Islam and live their lives according to teachings of Islam.

Revelation in stages also created a constant link between Allah Almighty and His beloved Prophet (SAW) giving moral support in times of need and distress:

"Thus (it is revealed), that We may strengthen thy heart." (Al-Furqan, 25:106)

Thus we can conclude from this we have a solution of every problem which we are facing in our lives in the Holy Book Quran.

Compilation of Quran

In the beginning, Quran was recorded in form of memorizing the verses of Holy Quran. But later the process of compilation of Quran started to preserve it in form of Book. When it comes to the compilation of Quran, it has been divided into specific parts and time in the history where different Muslim rulers at different times made different contributions to make the compilation of Quran better and more reliable. We will discuss the different stages of the compilation of Quran throughout the Islamic history which has made it possible to view and read Quran in its present form.

First Stage during the time of Prophet Muhammad (SAW): First time the compilation process of Quran was started in the life of Prophet Muhammad (SAW). In this stage, the arrangement and order of the Surahs and Ayahs were specified by the Prophet (SAW) and the text was written down. However, at this stage, the Quran was not compiled into a single book, comparatively was available in separate sheepskin and was memorized in its integrity by several companions of Prophet Muhammad (SAW).So, the initial compilation was started in the life of Prophet Muhammad (PBUH).

Second Stage during the Reign of Hazrat Abu Bakar (R.A): The second stage of compilation took place during the caliphate of Hazrat Abu Bakar (R.A). In the battle of Yamama a large number of sahaba, who had memorized Quran, were martyred. This became a source of quiet concern for many companions of the Prophet (SAW) and they feared about the preservation of Quran. Therefore Hazrat Umer (R.A)suggested to the Caliph that the Quran should be collected and compiled into a single book in order to ensure its preservation. Hazrat Abu Bakar (R.A) liked the idea but was afraid because the Prophet (SAW) himself had never taken this step and He (R.A) feared that this action might be considered a discrepancy from the However, later on, he had a change of heart and ordered Hazrat Zain bin Saabit (R.A) to be the chief scriber and work on compiling the Quran in a book form. All of the members of the commission were renowned Haffaz (memorizers) of the Quran, i.e. they had already memorized it in its entirety. After listening to various Haffaz, cross-referencing it with the different written verses of Quran found on tree leaves, scorch and leather skins, he compiled a final copy of Quran which was then presented to Hazrat Abu Bakar (R.A). Once the whole text was collected and compiled, the commission carefully proofread it and certified that it was correct and present in its entirety. So, the first Book version of Quran was compiled in the life of Hazrat Abu Bakar (R.A) the first caliph of Islam.

Third Stage during the Reign of Hazrat Usman (R

Correct Answer: C) Endoplasmic reticulum

Explanation

The question is asking about a system of membrane-lined sacs in the cytoplasm with a membrane that is connected to the nuclear membrane. The options to choose from are mitochondrion, ribosomes, endoplasmic reticulum, and Golgi apparatus. The correct answer is option C, which is the endoplasmic reticulum. The endoplasmic reticulum (ER) is a network of flattened sacs and branching tubules that extend throughout the cytoplasm of eukaryotic cells. It is continuous with the nuclear membrane, which surrounds the nucleus, and is composed of two types: rough endoplasmic reticulum (RER) and smooth endoplasmic reticulum (SER). RER is studded with ribosomes on its surface while SER lacks ribosomes. The ER is involved in various cellular processes, including protein synthesis, lipid metabolism, and detoxification. The RER, which has ribosomes attached to its surface, is responsible for the synthesis and modification of proteins that are destined for secretion, membrane insertion, or lysosomal degradation. The SER, on the other hand, is involved in lipid synthesis, hormone synthesis, and detoxification of drugs and toxins. In summary, the correct answer to the question is option C, which is the endoplasmic reticulum. The ER is a system of membrane-lined sacs that forms channels throughout the cytoplasm and whose membrane is continuous with the nuclear membrane. It is involved in various cellular processes, including protein synthesis, lipid metabolism, and detoxification.

Correct Answer: B. Their ideas are developed into products

Correct Answer: C. has

Explanation

(a) Explanation of terms used in business:

(i)Goodwill: Is a term which describes the value of business connections and reputation acquired over the years. It is an intangible asset of the business.

(ii)Patents: This is the exclusive right of an inventor of a product over his invention in order to prevent others from copying the invention once it is dully registered.

(iii)Trade Mark:This is a distinctive name or symbol given to a product which is dully registered to prevent another person from using it.

(iv)Copy right:This is the exclusive right granted to artists, musicians and authors to prevent their works from being copied or reproduced without prior permission.

(b) Factors that can lead to the dissolution of companies:

(i) If the owners pass a resolution to wind up.

(ii) If the company owes than it can afford to pay/insolvency not bankruptcy.

(iii) If the creditors of the company decide to apply to court for its dissolution.

(iv) If the management continuously has problems and cannot jointly run their business.

(v) If the purpose for which the company was formed becomes illegal or expires.

(vi) If the court decides to close the company.

(vii) If the government decides to close the company.

(viii) If the company fails to comply with statutory provisions such as failure to commence business within a year of incorporation.

Explanation

(a) Atmospheric resources:Are those elements such as wind, water, sunlight and gases which are of benefit to man, animals and plants

(b) Specific Examples

(1) Oxygen:

(i) Man breathes in oxygen

(ii) Oxygen combines with water vapour (oxidation) for chemical weathering

(iii) Supports animal life

(iv) Supports combustion

(v) For industrial purposes

(2) Carbon dioxide:

(i) Green plants take in carbon dioxide

(ii) Carbon dioxide and sunlight aid photosynthesis

(iii) Absorbs heat to control atmospheric temperature

(iv) Carbon dioxide combines with water to produce chemical weathering

(3) Nitrogen:

(i) Nitrogen in the atmosphere can be converted to nitrate in the soil

(ii) Combines with water to produce food for plants

(iii) May be used in electrical industries

(4) Water Vapour:

(i) Water vapour moderates atmospheric temperature

(ii) Important for rain formation

(iii) Resultant rain used by plants and animals effectively in the process of chemical weathering

(5) Sunlight:

(i) Provision of vitamin D

(ii) Important for drying

(iii) For photosynthesis

(iv) For solar energy

(6) Wind:

(i) For drying

(ii) For sporting (yatching)

(iii) For winnowing

(iv) For sailing

(7) Ozone: Protects the earth from ultra-violet rays of the sun.