Isaac Alamu

I NOW GOT it right, thank you all for your explaination....option D is very correct, i now get the question right.

THANKS FOR CHANGING THE OPTION TO THE CORRECT ONE. am honoured

YES.ricket is very correct, the efficiency of vitamin d leads to ricketism, the deficiency of vitamin a leads to night blindness , the efficiency of vitamin b lead to beriberi, the deficiency of vitamin c leads to scurvy...

option B is very correct, tongue serves as organ of taste...the tongue tells us whether the food we put inside our mouth is sweet, sour, salty, hot, tasteless, and bitter.the tongue also HELPS DURING CHEWING OF FOOD, it also helps in speech, that is why when someone tongue is affected the person will not be able to speak correctly again, but the tongue did NOT help in softening of food

change the option to option B, the option E is very wrong

OPTION D IS VERY CORRECT 100% PHALANGES is called the bone of the bone digit.D is correct.

SALT MASH IS CORRECT 100% SURE, the correct option is option A.Chuka Mike has said it all.

YES, the correct option is option B, maize rust is caused by fungi not virus,B is very correct.

Noble Mbachu, firstly let me explain these question to you...what is causal agent?, causal agent are agents that really cause the disease.but they have vectors, what is vector?, disease vector are agent that transfer disease from the causal agent to organisms and lot more, now the question say "ONE DISEASE NOT CAUSED DIRECTLY BY BACTERIA IS?", the correct option is A, malaria is the correct answer, malaria is a disease caused by a plasmodium parasite transmitted by mosquito bite, plasmodium parasite is the one that causes this disease not bacteria directly, and it was transfer by a mosquito bite, to avoid this disease...clear all bushes around you, drain all stagnant water, and use a mosquito net, option A is very correct, don't doubt it again.the correct answer is MALARIA.

nigerianscholars pls change the option to OPTION B, OPTION E is not correct, this is the second question that i will see with these same answer which is wrong, although if living organisms did not feed they will die but did you know that if they did not respire they will also die?, now let look the one that they all do.can plants eat food? definitely NO!,plants absorb nutrient/water from the soil, they produces the food themselves through a process called photosythesis,but they do respire, RESPIRATION is the process whereby living organisms break down food substance into smaller pieces inorder to produce energy needed for the daily activities, which one of they is to move in search of food...plants and animals respire to produce energy...for example if a person is sick to eat will be difficult for the person because at that present moment the sick person lacks ENERGY.

B is the correct option, nigerianscholars choose option E "FEED" pls can you explain?, it's wrong...very wrong! and if am the one that is wrong with these my little explaination below pls let me know,

RESPIRATION is the ability or the process whereby living organisms break down the food in order to produce essential energy needed for daily activities, FEEDING is the process whereby living organisms inject/takes in food substances...did you know that if the animal feed and respiration did not takes place that means the organisms will die because there will be no energy for the organisms to move and search for another food. for them to has the opportunity to take in another food that means respiration takes place.IF PLANTS DID NOT RESPIRE THEY WILL NOT BE ABLE TO REPRODUCE ANOTHER FOOD FOR THEMSELVES.

more explaination...

chromosome is found in a nucleus of the cell, actually i can call this the definition of a chromosome, this nucleus control the whole activities of the cell, the nucleus housed the chromosome.looking into the picture of a cell (as mike says)*which is true* it's located at the middle of the cell, the nucleus enclosed the chromosome.....the correct option is option A. and the correct answer is actually "NUCLEUS".

A is very correct, magnesium is the correct answer, did you know the meaning of the term "chlorosis"?, the term "chlorosis means yellow colouration, sometimes you will observed that yellow leaves appear on a tree or plants, this colouration did not just formed it's formed due to lack of some minerals or nutrients, the minerals that plants needs is broadly divided into two...micro nutrient(small), and major nutrient (large) they are required in large and small quantities...the major nutrients include chlorine(C), nitrogen (N), phosphorus(P), pottasium(K), sodium(NA),sulphur (S), calcium(CA), magnesium(M)....CNPKNASCAM, while the one required in small quantities include maganese, zinc, flourine, iron and so on.if one of them is lacked in a plants it's going to show some signs which that of magnesium leads to chlorosis (yellow colouration).

OPTION A is very correct, the correct answer is BILE, what are digestive enzymes?, they are the enzymes that takes part in digestion of food in an organisms, their functions are different and they are also specialized in their action...we have RENIN (one of my teacher said "if you don't want to forget this enzymes just call it REMI" this is one of yoruba name REMILEKUN), pepsin (he also said "call it pepsi" a soft drink), amlayse, maltase, lipase, ptytalin (that contain salivary gland), sucroce, etc excluding BILE.we all knew bile nah.

MORE explaination....cell is the basic unit of life, the functional, structural, and basic unit of life, cell theory include, All living organisms are made up of cell (that shows up that all living organisms on earth are made up of one or two cells ...in human being the cells include blood cell *red blood cell*white blood cell* and so on) be it unicellular or multi cellular, organ that performs different task in the cell includes nucleus, lysosome, chromosome, nucleous, ribosome, gogies apparatus, chloroplast, cytoplast, endoplasmic reticulum (rough),endoplasmic reticulum (smooth), and so on, nucleus is the organelles that control the activity of a cell, while the mithocondria is the power house of the cell, it's enable gasous exchange to takes place in a cell, if not for mithoncondria all the cells will become dead.

bacterial flagella impart motivity to the cell by girlding movement, did u know that some cell used this organelles for their movements, which one of them is euglena, we all knew the cell called euglena this cell is eventually popularised based on its characteristics to be able to perform both the animals and plants characteristics, in this cell flagella is used for movement, in amoeba pseudopodia is used for movement, in paramecium cillia is used for movement, and lot more.option C is the correct option, while the correct answer is girlding movement, because the flagella is hairy in nature that provide a girlding movement for the cell.GIRLDING MOVEMENT IS VERY CORRECT.

the correct option is option B, cilia in paramecium is used for locomotive movement, the organ that performs this task is different in various cells, flagellum is used for movement in euglena, pseudopodia is used for movement in amoeba, and so on..., cell is the basic, structural and functional unit of life, we have multi cellular, unicellular organisms, examples of these cell include spirogyra, euglena (which has the characteristics of plants and animals), amoba (shapeless) we are saying amoeba is shapeless but why is it that they gives it shape whenever they drew it in a textbook?, because whenever amoeba want to change his movement its has a little shape, that shows his direction. and also paramecium, volvox and so on.

option C is very correct, I like the explaination of my friend CHIKA MIKE, continue more grace and knowledge, this explaination clearly defined the answer, although some of us will be doubting that choosing option C is wrong but let of tell you it's the only correct OPTION,let revise the topic EXCRETION.... this is the process or the ability of an organisms to get rid of their metabolic waste product.different organs performs this task in different organisms, and some of these waste products includes urine, sweat, carbon dioxide, urea, amino acid, salt, and lot more, but FEACES is not among them.....the first time a teacher teach of this topic and he explained and gives examples excluding FEACES and i asked him why? and he gives me the same explaination as that of CHIKA MIKE....feaces is not among.

firstly let talks more about SOIL, what is soil?, soil is the uppermost layer of the earth crust that support plants growth, many things are done on the surface of the soil like AGRICULTURE( farming), RELIGIOUS (building of churches, mosque, and shrine), POLITICAL (building of house of representative office and lot more...) many things are ploted on the land example houses.the formation of this soil is called WEATHERING, types of soil include clayey soil, loamy soil and sandy soil, this soil contains micro organisms which some of them can be see with naked eyes while some cannot be see. example of the one we can see includes earthworm, millipide, centipide, snail etc...they are beneficial to the soil by CYCLING OF NUTRIENT,i.e they add nutrient to the soil both when they are still living and after their death. OPTION C IS VERY CORRECT.

OPTION A is very correct, the influence of soil on an organisms in a particular habitat is called EDAPHIC FACTOR, for example soil texture, soil profile, soil ph (the PH means Pondus de Hydrolium, it's the degree of soil alkanity and acidity), soil structure.examples BLOCK LINE, CRUMB, GRAINS and so on. soil water...example hydropic water, gravitational water, field water, capillary water. so the correct option is option A.

DARWIN is one of the scientists that propel many theory about nature. which he is the one that propound the theory of survival of the fittest, he said for example if a small cock wanted to mate with a hen, and a big cock saw him, that big cock will make sure that he is the one that mate with that hen and not the small one, and also interm of looking for food, the fittest one has 99.5% food while the small ones has just 0.5% food to eat....to my own observation Darwin tell us the real thing about nature, infact not only among lower animals but also among we HUMAN BEING.

option a is very correct, if a baby is female, there is 100% probability sure that her mummy ovum was fertilized by the sperm with X.because X is for female, while Y is for male.

OPTION A is very correct, SKELETON is the right answer, firstly what is skeleton?, skeleton is a bony frame work that gives support, shape, movement, and protection to the soft tissuses in the body, so this definition clearly state that option A is very right, I don't know maybe you know it more or not but i want to try to explain more on skeleton, now let go to FORMS OF SKELETON, 1)bone 2)chitin/cuticle 3)cartilage, TYPES OF SKELETON, 1)endo skeleton, exoskeleton, and hydrostatic/fluid skeleton, ENDOSKELETON is found inside an organisms E.G mammals, EXOSKELETON is found outside an organisms E.G snail, while the FLUID SKELETON is found in an organism like EARTHWORM.we have types of ENDOSKELETON which are AXIAL AND APPENDICULAR SKELETON.......

OPTION B is very correct, DESERT DWELLER is the correct answer, as we all knew that a place called desert is a place where the there is no water or alittle amount of water, there is nothing like rivers there, and any organisms that lives there will soley survived by the water its gain and absorbed from any fruit they ate..OPTION B IS VERY CORRECT.

B is the correct option, newton first law of motion states that "AN OBJECT VELOCITY CONTINUE IN A STATE OF REST UNLESS IT'S ACTED UPON BY AN EXTERNAL FORCES", this law wanted to cause confussion between the option B, AND D, if you take a close look at the two options, you will found out that OPTION D is not correct, "IN THE PRESENCE OF EXTERNAL FORCE", the statement means no matter how an external forces is, the object will still retain it position,(which is very wrong), my fellow student and scholars...think twice before choosing your answer, this is my own opinion that option B is the right option, i don't know why nigerianscholars choses option D. I need explaination from nigerianscholars before i can support their answer. and if any of you know the explaination please explain.NEVER STOP LEARNING, BECAUSE THE WORLD DID NOT STOP TEACHING.

OPTION D is very correct, mitochondria and chloroplast, MITOCHODRIA is used for respiration (the power house of the cell), CHLOROPLAST is essential for photosynthesis because its contain the green pigmentation used by the plants for photosynthesis.THE CORRECT OPTION IS OPTION D.

option b is very correct, the cillia is used by the paramecium for movement, and choosing the option "locomotive" is also correct, according to us in sciences we call it "locomotive movement", if the option did not provide "movement", then the correct option is "locomotive"

option b is very correct, uric acid is the right answer, because it's among one of insects watse products

option B is correct, the blood keeps the body warm always, when its cool the blood vessles of the skin constrite to reduce the amount of blood flowing to the skin.option B is very correct.

OPTION C IS VERY CORRECT, OBTAINING FOOD IS THE RIGHT ANSWER,and also spider also practice something like this, it used its cob web to catch any flies it sees.

option B is very correct, the ability of man to roll their tongue is characterized under physiological variation, the correct answer is option b.

option c is very correct, the plants need auxin for optical dominance .the right option is option C, the correct answer is AUXIN.

option A is the absolute correct option, according to common knowledge nobody will miss the answer, option A, SWEAT gland. and we all knew that the skin is a major organ in the body that excretes the sweat from our body.that means sweat gland is the organ that produce the sweat.the correct answer is SWEAT GLAND.

option A is the right option, tapeworm is an endoparasite, the life cycle of a tapeworm started from snail, we have tanea solium mostly found in pig, tenea saginata mostly found in cow, but did you know that this tapeworm is also present in human? human being can also contact tape worm if they ingest or take in any food(meat) that is not well cooked, that means the correct answer is INGESTING UNCOOKED FOOD, the right option is option A.

OPTION C IS VERY CORRECT, HOMOZYGOUS is the right answer, if the result after crossing is TT (which represent tallness) that means the offspring is homozygous tall, but if the result is Tt that means the offspring is tall but it's heterozygous...if the result is now double tt that means the offspring is short.(homozygous reccesive.option C is the right option.....

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THE RIGHT OPTION IS OPTION B.... the word "photo"according to science means light, we all knew the meaning of negative and positive likewise the differentiation, now we have negative phototaxism and positive phototaxism, you may be wondering why the other option is negative phototropism and positive phototropism, according to my own observation the word "tropism" is used for mostly plants, while the word 'taxism' is used for mostly animals. that is why the option are different...the correct option is option B.(NEGATIVE PHOTOTAXISM)

option A is very correct, we have phenotype, and genenotype. this phenotype referred to as the physical appearance of an organisms, while the genenotype represent the character that is not physical in an organisms but it's present in the gene.the correct option is option A...that means the right answer is PHENOTYPE.

the correct option is option C,leaf,....firstly what is excreation, this is the process whereby organisms get rid of their metabolic waste product, it can be in form of gas or liquid, there are some organ that help this process out, for example , skin,(which get rid of sweat), kidney (which filter blood and form urine), liver and so on, but leaf is not among...the correct answer is LEAF

OPTION B IS VERY CORRECT, ELECTION IS CONDUCT TO MAKE PEOPLE CHOOSE AND SELECT THEIR REPRESENTATIVE.the correct option is option B

option D is very correct, choosing HOMOSTATIC is very right,...we need the definition/meaning of this word, before we start choosing answer, what is HOMOSTATIC?...homostatic is the ability of an organisms to keep a fairly, steady internel environment.