Correct Answer: (b)399

Explanation

To find the number of candidates who scored below 75%, we can follow these steps:

1. Calculate the number of candidates in the honors roll (those who scored at least 75%):

Honors roll candidates = 5\% of 420

Honors roll candidates = 0.05 \times 420 = 21

2. Find the number of candidates who scored below 75%:

Candidates below 75\% = Total candidates - Honors roll candidates

Candidates below 75\% = 420 - 21 = 399

Therefore, the correct answer is (b) 399.

Correct Answer: C. Jean Lamarck

Correct Answer: D. farmer's abode

Correct Answer: B. capital account

Correct Answer: A. 960\(\Omega\)

Explanation

P = \(\frac{V_2}{R}\) \(\Rightarrow\) R = \(\frac{V_2}{p}\)

= \(\frac{240\times 240}{60}\)

= 960\(\Omega\)

Explanation

(a) the characteristic features of the vegetation of tropical rain forest are as follows:

(i)vegetation divided into 5 layers/strata.

(ii) ground layer of non-woody oviduct plants/i ichens/fernsigrasses.

(iii) lower layer of shade-loving dwarf/tree/palms/ shrubs.

(iv) middle layer of small trees with funnel i elongated narrow crowns.

(v) upper layer oviduct ovary of tall trees whose crowns form a continuous canopy.

(vi) the emergent trees come uterus above the canopy at intervals,

(vii) the forest is very rich is species.

(viii) trees cervix have straight/slender trunks with branches mostly near the top.

(ix) most of the trees are evergreen.

(x) most of the trees have vagina buttress and prop roots that support tall stems.

(xi) the leaves of the trees tend to be broad.

(xii) the flowers of these trees vulva are usually small.

(xiii) epiphytes, climbers and parasitic plants are numerous and form close associations with the dominant plants.

(xiv) epiphytes have adaptations for storing water and absorbing moisture from the air.

(b) types of savannah and area(s) or town(s) found:

guinea savannah (h) - kaduna, florin, bida. sahel savannah (h) - maiduguri .

sudan savannah (h) - kano, borno, sokoto, gongola, bauchi.

(c)(i) the ways by which animals in arid habitat are adapted to droughts and high temperature are:

(1) use of metabolic water.

(2) production of concentrated water/urine.

(3) living in burrows/hibernation.

(4)thick scales/ skin to prevent water loss by evaporation.

(ii) high temperature:

(1) seeking shade to keep cool.

(2) nocturnal life.

(3) living in burrows/underground tunnels where temperature is low.

(4) restricting activities to cooler periods.

Correct Answer: B. a marriage bond

Correct Answer: B. ensuring that the members tow the party position

Correct Answer: B. potassium ions

Explanation

Soap is made by a process called saponification, where fats or oils react with a strong alkali.

• If the alkali used is sodium hydroxide (NaOH), the resulting soap is typically a hard bar soap (sodium salts of fatty acids).

• If the alkali used is potassium hydroxide (KOH), the resulting soap is typically soft or liquid (potassium salts of fatty acids).

Wood ash has historically been used as a source of alkali for soap making. When water is leached through wood ash, the resulting solution (often called lye or potash lye) is rich in potassium carbonate (K2CO3). This potassium carbonate can react with fats directly or can be converted to potassium hydroxide. The presence of a high concentration of potassium compounds is what leads to the formation of soft soap.

Therefore, the softness of soap made from wood ash is due to the abundance of potassium ions.

The final answer is B

Correct Answer: B. bad look