Correct Answer: B. ababcdd

Correct Answer: A) chlorophyll and carotenoids

Explanation

Photosynthesis is a process by which plants, algae, and some bacteria convert light energy from the sun into chemical energy in the form of glucose. This process requires several pigments that absorb light energy and use it to drive the process of photosynthesis. The question is asking about the photosynthetic pigments. According to the options provided, the correct answer is option A: chlorophyll and carotenoids. Chlorophyll is the primary photosynthetic pigment that absorbs light energy and is responsible for the green color of leaves. Carotenoids are accessory pigments that absorb light energy in different parts of the visible spectrum and are responsible for the yellow, orange, and red colors of some fruits and vegetables. Option B is incorrect because chloroplasts and cytochromes are not pigments, but rather organelles and proteins involved in photosynthesis and respiration, respectively. Option C is incorrect because melanin and haemoglobin are not involved in photosynthesis at all, but rather are pigments involved in skin color and oxygen transport in the body, respectively. Option D is incorrect because while carotenoids are indeed a photosynthetic pigment, haemoglobin is not involved in photosynthesis. In summary, the correct answer to the question is option A: chlorophyll and carotenoids. These pigments are essential for the process of photosynthesis, which is how plants and other organisms produce their own food.

Explanation

(a) Maximum price legislation is a policy of fixing the price of a product below its equilibrium price by the government, above which it is illegal to sell the product.

(b)(i) To enhance stability of farmers’ incomes in times of bumper harvest.

(ii) To encourage a steady flow of agricultural output at stable prices.

(iii) To stabilize the amount of incomes households spend on food, making it possible for households to plan their expenditure on

(iv) To prevent exploitation of farmers by middlemen who may want to pay lower prices for their produce.

(v) To reduce the risks associated with price fluctuations of agricultural produce.

(c)(i) Fixing price below equilibrium may lead to excess demand. This creates shortage of the product.

(ii) Parallel/illegal/black markets may develop and some products may disappear from the regular markets to be sold in illegal markets at prices far above the equilibrium price.

(iii) Shortage of products may lead to rationing. This may place a limit on the quantity of products consumers can buy.

(iv) Conditional sales will emerge where buyers may be required to fulfill certain conditions before purchases can be made.

(v) Queues will develop since the commodities are hard to come by.

(vi) Distortions in production may result as only products whose prices are not controlled will be produced.

(vii) Preferential sales will emerge as sellers will sell to whom they know.

(viii) Hoarding of goods will become prevalent.

(ix) Goods will be smuggled to areas/places with higher prices.

(x) Loss of profit for producers will lead to a reduction in the quality of the products.

Correct Answer: D. 36°

Correct Answer: A. high vapour pressure and low boiling point

Correct Answer: C. fell down dead

Correct Answer: B. Enso

Explanation

(a) px + qy = z

\(p \begin{pmatrix} 2 \\ 3 \end{pmatrix} + q \begin{pmatrix} 5 \\ -2 \end{pmatrix} = \begin{pmatrix} -4 \\ 13 \end{pmatrix}\)

\(\begin{pmatrix} 2p + 5q \\ 3p - 2q \end{pmatrix} = \begin{pmatrix} -4 \\ 13 \end{pmatrix}\)

Thus,

\(2p + 5q = -4 .....(1)\)

\(3p - 2q = 13 ......(2)\)

Solving the equations, we have p = 3 and q = -2.

(b)(i)

(ii) See attached graph for the quadrilateral W(2, 3), X(4, -1), Y(-3, -4) and Z(-3,2).

(iii) See attached for the image for the quadrilateral WXYZ under an anticlockwise rotation of 90° is \(W_{1}(-3, 2), X_{1}(1, 4), Y_{1}(4, -3)\) and \(Z_{1}(-2, -3)\).

Correct Answer: B. DBMS

Correct Answer: C. N450 000 profit