Correct Answer: B) Snail

Explanation

Schistosoma, also known as Bilharzia, is a type of parasite that causes a disease called schistosomiasis. In the life history of Schistosoma, there are two hosts involved: the definitive host and the intermediate host. The definitive host is usually a mammal like a human, while the intermediate host is usually a snail. The intermediate host is important because that is where the parasite undergoes asexual reproduction and develops into a stage that can infect the definitive host. In this case, the correct answer to the question is Option B: Snail. This is because the snail is the intermediate host in the life history of Schistosoma. Once the parasite has developed in the snail, it is released into the water where it can infect the definitive host, which is usually a human. To prevent schistosomiasis, it is important to avoid contact with contaminated freshwater sources where the snails may be living. This can be achieved by practicing good hygiene and avoiding activities like swimming or bathing in freshwater sources that may be contaminated with the parasite. To learn more about schistosomiasis and the life history of Schistosoma, please refer to the relevant sections in your Biology textbook.

Correct Answer: A. transactionary

Explanation

The transactionary motive of money is when people hold money for the purpose of meeting their daily needs and wants. It is simply the desire to hold money in order to finance transactions.

Correct Answer: D) ?150,000

Correct Answer: D) Kurt Waldheim

Explanation

Option A is Javier Perez de Cuellar, Option B is Alger Hiss, Option C is Kofi Annan, Option D is Kurt Waldheim (Correct), and Option E is Ahmed Salim.

The correct answer to this question is Option D, Kurt Waldheim. He served as the Secretary-General of the United Nations from 1972 to 1981. During his tenure, he focused on issues such as disarmament, human rights, and environmental protection.

Please note that this explanation may not be totally accurate.

Correct Answer: D. Liverpool

Correct Answer: A. Zeus and Hermes

Correct Answer: C) Zygotene

Explanation

Zygotene is the second stage of the prophase of meiosis, following leptotene, during which homologous chromosomes begin to pair.

Explanation

(a) Factors of soil formation are: (1) parent material (2) climate (3) organisms (4) topography (5) time.

(1)Parent materials: (i) constitute the major material from which soil is formed. (ii) they are igneous, sedimentary and meta-morphic rocks. (iii) That determine the chemical composition of the soil that is formed. (iv) They also contain different minerals which account for differences in the fertility of soils formed from each of the different types. (v) determine the physical characteristic of the soil. (vi) hardness of parent material affects the rate of soil formation.

(2) Climate: (1) The two main elements of climate which affect soil formation are rainfall and temperature. (ii) rainfall affects soil formation through erosion, solution, chemical reactions and enhancement of vegetative growth whose roots cause further breakdown of rocks. (iii) temperature affects the rate of chemical weathering of rocks; (iv) temperature also causes the expansion and contraction of rocks leading to disintegration. (v) wind blast also causes abrassion of rocks. (vi) rain water transports rock particles after disintegration.

(3) Organisms: (i) organism produces CO which forms carbonic acid with water and enhances the weathering of rocks. (ii) these include microbes such as bacteria and macrobes such as earthworms. (iii) macrobes help in weathering by burrowing and creating crevices and turning or mixing soil particles. (iv) macrobes also improve soil aeration and water percolation which will enhance chemical and physical weathering. (v) microbes help in the decomposition of organic matter in the soil. (vi) they increases soil fertility. (vii) activities of man, animals and micro-organism influence the development of soil.

(4) Topography: (i) affects the rate of run-off and erosion. (ii) steep slopes encourage erosion and retard soil formation. (iii) soil formation is faster in the valley than on slopes. (iv) steepness of the slope affects the rate of abrassion of rocks and hence, soil formation.

(5) Time: (i) is very important in soil formation. (ii) a long period of time allows for the formation of matured soils (iii) a short time results in the formation of immature soils. (iv) It determines whether the soil is well developed or not. (b) Chemical processes in the weathering of rocks include: (i) hydrolysis (ii) hydration (iii) carbonation (iv) oxidation or reduction. (v) solution

Correct Answer: D. \(\frac{8}{15}\)

Explanation

Prime number in the experiment are 2,3 and 5 with frequencies 10,14 and 8

P(obtaining a prime number) = \(\frac{10+14+8}{60}\)

= \(\frac{32}{60}\) or \(\frac{8}{15}\)

Correct Answer: D. 1.20

Explanation

\(a^{\frac{5}{6}} \times a^{\frac{-1}{n}} = 1\)

\(\implies a^{\frac{5}{6} + \frac{-1}{n}} = a^{0}\)

Equating bases, we have

\(\frac{5}{6} - \frac{1}{n} = 0\)

\(\frac{5n - 6}{6n} = 0\)

\(5n - 6 = 0 \implies 5n = 6\)

\(n = \frac{6}{5} = 1.20\)