Correct Answer: A. I, II, and III

Explanation

Glycogen, starch, and cellulose are all polysaccharides composed of many glucose monomers linked together.

Correct Answer: A. weeds

Explanation

(a)Factors affecting the rate of diffusion: -Presence of concentration gradient; when concentration of substance is high the rate of movement of molecules will increase/molecules move from the region of higher concentration to the region of lower concentration; leading to an increase in the rate of diffusion. Surface area: Large surface area will allow more molecules of substance to diffuse. State/nature of the diffusing substance: Molecules in gaseous state diffuse faster than those in liquids or solid states/molecules in solid state diffuse slower than those of liquid and gas. Size of the molecules/particles: The smaller molecules will move/diffuse faster than larger molecules. Temperature: Increase in temperature increases the movement of molecules/increases in diffusion/decrease in temperature slows down movement of molecules/decreases diffusion.

(b)(i)Active transport: This is the movement of molecules from a region of low concentration to a region of high concentration/against a concentration gradient. Across a living membrane. Using energy from the cell.

(ii)Transpiration: Loss of water in the form of vapour; from the aerial parts of plants.

(c) Reduction of Transpiration:Closure of stomata during the day. Reduction of leaf size/leaf modified into spines. Dropping of leaves in the dry season. Development of thick cuticle. Presence of hairs over leave surfaces. Presence of sunken stomata.

(d)Red Blood Cells:Biconcave shape/disc-like, increases its surface area for oxygen uptake. Elastic membrane, enables it to flow easily through the blood vessels. Presence of hemoglobin; for oxygen uptake. Thin membrane; for easy diffusion of oxygen/carbon-dioxide.

Correct Answer: B. initiated it

Explanation

Main functions of the executive in a modern state are: (i)Policy formulation is one of the major functions of the executive.

(ii) Implements the laws made in the state.

(iii) Appointment and removal of top officials of the state.

(iv) Declaration of war.

(v) He conducts foreign policy of the state

(vi) He exercises the prerogative of mercy.

(vii) The executive initiates bills, defends them and recommends measures for laws to be made.

(viii) He prepares and delivers the annual income and expenditure of the state.

(ix) Maintenance of law and order through the police and other law enforcement agencies.

(x) Signing of bills into laws.

(xi) The executive can make laws through delegated authority.

(xii) Provision of social amenities and infrastructural/facilities, e.g. roads.

(xiii) The executive can declare a state of emergency.

(xiv) He performs ceremonial functions.

Correct Answer: D. became very angry

Explanation

fly off the handle; Lose one's temper

Correct Answer: C. Sparsely populated regions of the world

Explanation

b i. x? = \(\frac{14+16+17+18+22+24+27+28+31+33}{10}\)

x? = \(\frac{230}{10}\)

y = \(\frac{22+19+15+13+10+12+3+5+3+2}{10}\)

= \(\frac{104}{10}\)

ii.

x?\(_1\) = \(\frac{14+16+17+18+22}{5}\) → \(\frac{79}{5}\) = 15.8

c.

d i. There is a negative correlation between X and Y. X increases as Y decreases

ii. The point labelled Y1 is the corresponding value on Y-axis when X = 20, Y1 = 12.6

Correct Answer: D. 45 - 50oC