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UI 2018/2019 Admission Thread - Education (8) - Nairaland

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Re: UI 2018/2019 Admission Thread by Papi112: 4:49pm On Nov 22, 2017
makethegrades:
Is

R.D = Wt. Of substance in air / wt. Of equal volume of water
Since Hooke's law is obeyed we use the extension in place of weight.
We have extension of the metal in air
We also have extension of metal in water but we don't have weight of the water that is equal in volume to the metal
So use Archimedes principle 'upthrust = weight of fluid displaced' to get the weight of equal volume of water
Upthrust= wt. in air - wt. In water
= 10.5 - 6.8
= 3.7 cm
> wt. Of equal volume of water = 3.7 cm
Applying R.D formula
R.D = Wt. Of substance in air / wt. Of equal volume of water
= 10.5/3.7
= 2.84
Confirm
To add to it
R. D =weight in air /weight displaced by object in water(upthrust)

Using hooks law
R. D=L1/L1-L2
Re: UI 2018/2019 Admission Thread by Salarys: 4:56pm On Nov 22, 2017
Pes13:
Biology

1. The center for learning and memory in the human brain is the A) olfactory lobe B) cerebrum C) medulla oblongata D) cerebellum.



2. The physical space occupied by an organism together with its functional role in the community can be described as A) niche B) environment C) habitat D) biome.

3. The hygrometer is used for measuring A) rainfall B) relative humidity C) salinity D) specific gravity.

4. The highest percentage of energy in an ecosystem occurs at level of the A) producers B) primary consumers C) secondary consumers D) decomposer.

5. Carbon (IV) oxide content of the atmosphere is least affected by A) burning of fossil fuel B) cutting down and clearing of forests C) plant and animal respiration D) forest fires.

6. A freshwater pond may contain A) pond skater, water lily, shark and mosquito larva B) water lily, fish water scorpion and dragonfly larva C) tad pole, water boatman, leeches and crab D) water beetle, shrimps, water snail and water bug.

7. The epiphytic habitat can best be described as A) aquatic C) arboreal B) terrestrial D) estuarine.


8. The distribution of plants in a rain forest is governed mainly by A) rainfall pattern B) vegetation C) soil types
D) amount of sunlight


9. The number of plant species obtained from a population study of a garden is as follows; Guinea grass (15), Ipomea spp. (5) Sida spp (7) and Imperata spp. (23). What is the percentage of occurrence of Imperata spp.? A) 16% B) 23% C) 35% D) 46%.

10. The greatest influence on a stable ecosystem in nature is excreted by A) rainfall B) animals C) man D) pollution.

11. The factor the least affects food shortage in sub-saharan Africa is A) drought B) flooding C) pests D mixed – cropping

12. In man, the ability to roll the tongue is a variation classified as A) structural B) morphological C) anatomical D) physiological.

13.Which of the following statements is true of blood groups and blood transfusion? A) Group A can donate to group A only B) Group B can donate to group B only C) Group O is the universal recipient D) Group AB is the universal recipient

14. A tall plant crossed with a dwarf one produces offspring of which half are tall and half are dwarf. What are the genotypes of the parents? A) Tt, tt D) TT, TT. B) TT, tt C) Tt, Tt


15. Both recessive and dominant characters are found A) at the same locus of a homologous chromosome cry B) at different loci of homologous chromosome C) on different chromosomes in the cell D) on the same chromatid in a chromosome.

16. which of the following is likely to encourage inbreeding in plants A) monoecious B) dioecious C) hermaphrodite
D
protandrous.

17. The probability of a baby being a boy or a girl depends on the contribution of the A) mother’s sex cell B) mother’s X chromosome C) father’s sex cell D) father’s somatic chromosome.

18. The ability of an organism to live successfully in an environment is known as A) succession C) adaptation B) resistance D) competition.

19. For heterotrophic organisms, competition is least caused by inadequacy of A) nutrients B) light C) space D) mates

20. The most important adaptation of xerophytes is the ability of the protoplasm to A) absorb water and swell cry B) resist being damaged by loss C) shrink from the cell wall D) store sugar and minerals in the vacuoles.

21. The stem of a typical aquatic plant usually has many A) water cavities
B) water-conducting cells C) air cavities D) intercellular spaces.


22. A green snake in green grass is able to escape notice from predators because of its A) warning colouration B) disruptive colouration C) cryptic colouration
D) countershading.

23.The role of the male adult honey bee is to A) mate with the queen B) care for the young C) clean the hive D) ventilate the hive.

24.Darwin is considered the first scientist who correctly explained the theory of A) organic evolution B) use and disuse C) special creation D) spontaneous generation.
Re: UI 2018/2019 Admission Thread by boyejo123(m): 4:57pm On Nov 22, 2017
kidneystones:


I think the correct option for 14 is A
yh
Re: UI 2018/2019 Admission Thread by boyejo123(m): 5:01pm On Nov 22, 2017
[quote author=Salarys post=62618127][/quote]pls how do you make your text bold? kindly explain
Re: UI 2018/2019 Admission Thread by Nobody: 5:04pm On Nov 22, 2017
overcomer90:


All answers are correct but l am not sure of number 5 I think it is C
the answer should be (B). Using logical reasoning,( a medically proven fact for men) as opposed to analytical reasoning, a (medically proven fact for women). all the listed factors affect the level of atmospheric Co2 in one way or other; but the question says: the factor that least affects the level of atm. Co2. Option (B) is correct because it is a RANDOM factor and only depends on MAN as to whether or not trees would be cut. But option (C ) is wrong because PLANTS AND ANIMALS respire constantly and thus pose significant effect to the level o atmospheric Co2. I hope you get this? Love you!

1 Like

Re: UI 2018/2019 Admission Thread by Nobody: 5:15pm On Nov 22, 2017
Am presently reading carbon and its compounds. pls is it really necessary to also learn the laboratory preparation chemical properties physical properties test reactions for CO2, CO, CO3 etc cos it seems difficult to cram how do u guys learn those stuffs pls?
Re: UI 2018/2019 Admission Thread by boyejo123(m): 5:20pm On Nov 22, 2017
Drbabalola:
the answer should be (B). Using logical reasoning,( a medically proven fact for men) as opposed to analytical reasoning, a (medically proven fact for women). all the listed factors affect the level of atmospheric Co2 in one way or other; but the question says: the factor that least affects the level of atm. Co2. Option (B) is correct because it is a RANDOM factor and only depends on MAN as to whether or not trees would be cut. But option (C ) is wrong because PLANTS AND ANIMALS respire constantly and thus pose significant effect to the level o atmospheric Co2. I hope you get this? Love you!

what of no.10 sir
i think it should be rainfall since rainfall serves as means of excreting excess co2 and water in the atmosphere but av seen many people choose MAN .
how does man excretion brings about stable ecosystem
Re: UI 2018/2019 Admission Thread by Hipprocrates(m): 5:38pm On Nov 22, 2017
Kidneystones, abeg add me too. 08144843593
Re: UI 2018/2019 Admission Thread by kidneystones(m): 6:44pm On Nov 22, 2017
Hipprocrates:
Kidneystones, abeg add me too. 08144843593
K
Re: UI 2018/2019 Admission Thread by Pes13: 7:37pm On Nov 22, 2017
akanbidamilare:
Am presently reading carbon and its compounds.
pls is it really necessary to also learn the
laboratory preparation
chemical properties
physical properties
test
reactions
for CO2, CO, CO3 etc
cos it seems difficult to cram
how do u guys learn those stuffs pls?

My brother, u must know everything.

MIMD you, if you cram, there is high tendency you forget.

Enjoy and understand it, it not hard. You will love it.
Re: UI 2018/2019 Admission Thread by Pes13: 7:39pm On Nov 22, 2017
boyejo123:


what of no.10 sir
i think it should be rainfall since rainfall serves as means of excreting excess co2 and water in the atmosphere but av seen many people choose MAN .
how does man excretion brings about stable ecosystem

You are right, it is not amount of sunlight
Re: UI 2018/2019 Admission Thread by Nobody: 8:28pm On Nov 22, 2017
Pes13:

My brother, u must know everything.
MIMD you, if you cram, there is high tendency you forget.
Enjoy and understand it, it not hard. You will love it.
ohhh thanks
Re: UI 2018/2019 Admission Thread by Nobody: 8:32pm On Nov 22, 2017
akanbidamilare:
Am presently reading carbon and its compounds.
pls is it really necessary to also learn the
laboratory preparation
chemical properties
physical properties
test
reactions
for CO2, CO, CO3 etc
cos it seems difficult to cram
how do u guys learn those stuffs pls?
u must know everything including the uses/applications. But make sure u don't cram pls. Coz: La cram, la pour, la pour la forget. Lols
Re: UI 2018/2019 Admission Thread by psalmhorah(m): 8:37pm On Nov 22, 2017
makethegrades:
Is

R.D = Wt. Of substance in air / wt. Of equal volume of water
Since Hooke's law is obeyed we use the extension in place of weight.
We have extension of the metal in air
We also have extension of metal in water but we don't have weight of the water that is equal in volume to the metal
So use Archimedes principle 'upthrust = weight of fluid displaced' to get the weight of equal volume of water
Upthrust= wt. in air - wt. In water
= 10.5 - 6.8
= 3.7 cm
> wt. Of equal volume of water = 3.7 cm
Applying R.D formula
R.D = Wt. Of substance in air / wt. Of equal volume of water
= 10.5/3.7
= 2.84
thanks man.. m grateful ..
Re: UI 2018/2019 Admission Thread by Nobody: 8:37pm On Nov 22, 2017
boyejo123:


what of no.10 sir
i think it should be rainfall since rainfall serves as means of excreting excess co2 and water in the atmosphere but av seen many people choose MAN .
how does man excretion brings about stable ecosystem
b4 u attempt a question, u need to look at the level technicality attached to it. And that means your reasoning should go indepth within the shortest possible time, as time is not on your side. Ecosystem simply refers to PLANTS and ANIMALS living and interracting together with their physical environment. Remember MAN is also an ANIMAL( but higher one in this case). Animals exert the greatest presure on the ecosystem because of their complex nature. I.e they are heterotrophs(they feed directly or indirectly on plants). MAN being an higher animal means: he has better adaptive traits than other animals( especially in terms of reasoning), hence he could make proper or otherwise use of environment than any other living thing, even animals. Is that understood? Shalom!
Re: UI 2018/2019 Admission Thread by Salarys: 8:40pm On Nov 22, 2017
boyejo123:


what of no.10 sir
i think it should be rainfall since rainfall serves as means of excreting excess co2 and water in the atmosphere but av seen many people choose MAN .
how does man excretion brings about stable ecosystem

Wow...you just brought my attention towards EXCRETED.. nonetheless if that is the case, pollution should be the greatest influence that affects its stability from CO to CO2 to CFCs to the depletion of the ozone layer etc ... I think so!

How does rainfall serve as a means of excreting excess CO2 sir?
Re: UI 2018/2019 Admission Thread by Salarys: 8:51pm On Nov 22, 2017
Pes13:


You are right, it is not amount of sunlight

Sir, I believe this is for question 14.

Isn’t the rainfall pattern in rainforests even all through... considering that I thought the distribution of plants should then be mainly dependent on the amount of sunlight..

Please shed more light
Re: UI 2018/2019 Admission Thread by Nobody: 9:04pm On Nov 22, 2017
Salarys:


Wow...you just brought my attention towards EXCRETED.. nonetheless if that is the case, pollution should be the greatest influence that affects its stability from CO to CO2 to CFCs to the depletion of the ozone layer etc ... I think so!

How does rainfall serve as a means of excreting excess CO2 sir?
I'm very sure my senior medical colleague- Drpes13 made a typing error when writing this question. He typed EXECRETED instead of EXERTED. I expect him to confirm the mistake himself.
Re: UI 2018/2019 Admission Thread by Pes13: 9:08pm On Nov 22, 2017
Salarys:


Sir, I believe this is for question 14.

Isn’t the rainfall pattern in rainforests even all through... considering that I thought the distribution of plants should then be mainly dependent on the amount of sunlight..

Please shed more light

I used to think sunlight was d answer, but after consulting several Past questions in addition to oau putme question and refrence, I was humbled to summit.

One thing is that plant receive adequate sunlight in rainforest, which means sunlight cannot be a limiting factor since they always have more than enough.

But for whatever reason, amount of rainfall is not constant, reason you will see a vague value in textbooks e.g 200-250mm per annum.

sunlight supply is constant and adequate, but rainfall varies even in tropical forest.

Rain fall in Lagos than Abeokuta.
Re: UI 2018/2019 Admission Thread by Nobody: 9:12pm On Nov 22, 2017
Pes13:


I uses to think sunlight was d answer, but after consulting several Past questions in addition to oau putme question and refrence, I was humbled to summit.

One thing is that plant receive adequate sunlight in rainforest, which means sunlight cannot be a limiting factor since they always have more than enough.

But for whatever reason, amount of rainfall is not constant, reason you will see a vague value in textbooks e.g 200-250mm per annum.

sunlight supply is constant and adequate, but rainfall varies even in tropical forest.

Rain fall in Lagos than Abeokuta.
yeah u are right! Amount of rainfall varies at times. Swampy areas such as ogun, lagos, delta e.t.c. are expected to have the highest amount of rainfall per annum ranging from 200-250cm; while tropical forests may have 150-200cm. The trick is just that if due to weather irregularities, the rainfall expected for SWAMPY areas reduced at a particular time, the same would cause reduction in the amount of rainfall expected for tropical forests at that same time, such that the expected difference in vegetation for both areas remain intact. Hope you get this?
Re: UI 2018/2019 Admission Thread by Nobody: 9:51pm On Nov 22, 2017
what is the difference between homogeneous and heterogeneous mixture?
Re: UI 2018/2019 Admission Thread by Nobody: 9:52pm On Nov 22, 2017
what is the difference between homogeneous and heterogeneous mixture?
Re: UI 2018/2019 Admission Thread by boyejo123(m): 9:56pm On Nov 22, 2017
Drbabalola:
I'm very sure my senior medical colleague- Drpes13 made a typing error when writing this question. He typed EXECRETED instead of EXERTED. I expect him to confirm the mistake himself.

wow
if its exerted then it's actually the Man,I concur
but if its excreted I'll go for rain
Re: UI 2018/2019 Admission Thread by DrAuthentic: 9:57pm On Nov 22, 2017
A test tube of radius 1.0cm is loaded to 8.8g. If is placed upright in water, find the depth to which it would sink
A. 2.8cm
B. 5.2cm
C. 25.5cm
D. 28.0cm
Re: UI 2018/2019 Admission Thread by kidneystones(m): 9:59pm On Nov 22, 2017
akanbidamilare:
what is the difference between homogeneous and heterogeneous mixture?
Homogeneous ::the mixture are in the same physical state while heterogeneous different physical state.
Re: UI 2018/2019 Admission Thread by Hardebaryor(m): 9:59pm On Nov 22, 2017
Lemme also share my own problem as regards reading to my boss Pes13.

Whenever I'm reading my textbooks I always have the urge to complete it as soon as possible especially when exam date as been announced but at the same time I will also want to re-read the previous ones I've read so as to have better understanding. So at the end of the day, the reading becomes irregular.


PS: I also notice that when the exam date has been announced i feel like it's about a week for the exam to hold even if the exam is said to hold after 6 months.
Re: UI 2018/2019 Admission Thread by Papi112: 10:06pm On Nov 22, 2017
boyejo123:


wow
if its exerted then it's actually the Man,I concur
but if its excreted I'll go for rain

Man
Animals entails man and other animal
Ecosystem consist of animal and plants

It shouldbe animal
Re: UI 2018/2019 Admission Thread by CROWNesty: 10:10pm On Nov 22, 2017
@pes13 what is the least process in realising CO2 is it respiration or cutting down vegetation
Re: UI 2018/2019 Admission Thread by DrBESTJC: 10:15pm On Nov 22, 2017
PHYSICS.

In an experiment to determine terminal velocity, as the pressure increases, the viscosity of a liquid...
(A) Increases then decreases
(B) Decreases
(C) Remains constant
(D) Increases.


Please I need explanations.
Re: UI 2018/2019 Admission Thread by Nobody: 10:17pm On Nov 22, 2017
akanbidamilare:
what is the difference between homogeneous and heterogeneous mixture?
homogenous mixture is uniform, and components will hardly be identified from one another. E.g coca-cola drinks, alloys e.t.c while heterogenou mixture is not uniform. E.g muddy water
Re: UI 2018/2019 Admission Thread by Nobody: 10:30pm On Nov 22, 2017
DrBESTJC:
PHYSICS.

In an experiment to determine terminal velocity, as the pressure increases, the viscosity of a liquid...
(A) Increases then decreases
(B) Decreases
(C) Remains constant
(D) Increases.


Please I need explanations.
I may be wrong, but as a science student ,I should be able to give you a nearly accurate explanation, if at all not accurate. Viscousity is a force associated with flow of fluids. It's a form of pressure and it increases with increase in thickness of fluids. I.e palmoil is more viscous than ordinary water. Again, pressure increases with depth: such that pressure at surface of fluids is less than that at the bottom, hence viscousity increases with depth. Hope you get my explanation? Maybe gurus have contrary opinion sha.

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