Isaac Alamu

Never stop learning, because the world did not stop teaching.

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Isaac provided a contribution 11 months ago

Where is energy produced in the cell? | Biology Past Questions

Explanation
Mitochondrial is a membrane-bound organelles, but they're membrane-bound with two different membranes. And that's quite unusual for an intercellular organelle. Those membranes function in the purpose of mitochondria, which is essentially to produce energy. That energy is produced by having chemicals within the cell go through pathways, in other words, be converted. And the process of that conversion produces energy in the form of ATP, because the phosphate is a high-energy bond and provides energy for other reactions within the cell. So the mitochondria's purpose is to produce that energy. Some different cells have different amounts of mitochondria because they need more energy. So for example, the muscle has a lot of mitochondria, the liver does too, the kidney as well, and to a certain extent, the brain, which lives off of the energy those mitochondria produce. So if you have a defect in the pathways that the mitochondria usually functions with, you're going to have symptoms in the muscle, in the brain, sometimes in the kidneys as well; many different types of symptoms. And we probably don't know all of the different diseases that mitochondrial dysfunction causes.

Isaac provided a contribution 11 months ago

interveinal chlorosis is normally associated with the deficiency of | Biology Past Questions

Explanation
Chlorosis is the yellowing of leaf tissue due to a lack of chlorophyll.
Chlorosis can result in the whole plant or leaf turning light green or yellow.
It can also be more localized. For example, yellowing of the veins themselves or between the veins (interveinal chlorosis).
Interveinal chlorosis, often called iron chlorosis can be caused by a deficiency of several micro-nutrients; Iron, Zinc, and Manganese.
But the lack of iron is one of the more common nutrients associated with chlorosis.
The way to separate an iron deficiency from a zinc or manganese deficiency is to check what foliage turned chlorotic first. Iron chlorosis starts on the younger or terminal leaves and later works inward to the older leaves.
However, manganese and zinc deficiencies develop on the inner or the older leaves first and then progress outward.
Plants need iron for the formation of chlorophyll.

So, the correct answer is A


Isaac provided a contribution 11 months ago

All living things | Biology Past Questions

Explanation

Eliminate Photosynthesize and Transpire as both are found only in plants only.

Eliminate Movement as Plants are fixed and do not move from place to place as do animals but parts of plant may respond to stimulus as irritability/sensitivity like phototropism,etc.

Between Feeding and Respiration we need to understand what the mind of the examiner is in asking such question.

This is my opinion here: Respiration happens both in plants and animals. All living organisms including micro-organisms must respire whether aerobic or anaerobic to generate energy no matter how many ATPs are produced to power life systems. Respiration is the breakdown of food substances to liberate energy for life processes.

Feeding is the simply the ingestion of food and is one part of nutrition. Nutrition is feeding(ingestion), digestion, absorption, assimilation, egestion. Not all plants that ingest food except carnivorous or insectivorous plants like pitcher plants that traps its prey and digest them. PLANTS ALSO ABSORB NUTRIENTS FROM THE SOIL SUCH AS NITRATE, PHOSPHATE, ETC.

Nutrition in plants have two types: chemosynthetic and photosynthetic and both are called Autotrophic mode of nutrition.

Photosynthesis is the process whereby green plants MANUFACTURE/SYNTHESIZE/PRODUCE (NOT FEED/INGEST) their own Food Substances (Organic compounds) using CO2 from the atmosphere and water molecules being absorbed from the soil, chlorophyll and enzymes in the presence of sunlight. The plant here does not feed.

Therefore not all living organisms feed/ingest. MY ANSWER IS "B"


Isaac provided a contribution 11 months ago

Use the diagram to answer the question.The process of water loss and intake indi… | Biology Past Questions

Explanation

Most frog species show little resistance to evaporative water loss (EWL) through their skin.

- The movement of water across membranes from areas of high concentration (lots of water) to areas of low concentration (less water) is called osmosis. The reason frogs do not have to actively drink water and instead can sit in a bowl of water and absorb water passively is due, in large part, to osmosis.

- That is, frogs do not drink like we do; they absorb water directly through their skin in an area known as the 'drinking patch' located on their belly and the underside of their thighs.




Isaac provided a contribution 12 months ago

Use the diagram to answer the question.The process of water loss and intake indi… | Biology Past Questions

To me option A is the correct answer, if you look at the picture clearly it’s indicated that the water is evaporating away from the frog body surface, means it’s Evaporation and osmosis



Isaac provided a contribution 2 years ago

Which of the following is not a Newton’s law of motion? | Physics Past Questions

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

Isaac provided a contribution 2 years ago

All living things | Biology Past Questions

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

Isaac provided a contribution 2 years ago

The deficiency of vitamin D leads to | Biology Past Questions

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...

Isaac provided a contribution 2 years ago

Which of the following is not a function of a tongue? | Biology Past Questions

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

Isaac provided a contribution 2 years ago

All living things | Biology Past Questions

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

Isaac provided a contribution 2 years ago

Which bone is called the bone of the digits? | Biology Past Questions

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

Isaac provided a contribution 2 years ago

Which of these ecosystem has the lowest primary productivity per square meter? | Biology Past Questions

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

Isaac provided a contribution 2 years ago

Which of the following diseases is NOT caused by a virus? | Biology Past Questions

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

Isaac provided a contribution 2 years ago

One disease NOT caused directly by bacteria is | Biology Past Questions

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.

Isaac provided a contribution 2 years ago

All living things | Biology Past Questions

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.

Isaac provided a contribution 2 years ago

All living things | Biology Past Questions

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.


Isaac provided a contribution 2 years ago

In which of the following parts of a cell is the chromosome found? | Biology Past Questions

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".


Isaac provided a contribution 2 years ago

Interveinal chlorosis is normally associated with the deficiency of | Biology Past Questions

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).

Isaac provided a contribution 2 years ago

All of the following are digestive enzymes except | Biology Past Questions

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.

Isaac provided a contribution 2 years ago

Where is energy produced in the cell? | Biology Past Questions

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.

Isaac provided a contribution 2 years ago

Bacterial flagella impart motility to the cell by | Biology Past Questions

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.

Isaac provided a contribution 2 years ago

The cilia in paramecium are used for ______ | Biology Past Questions

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.

Isaac provided a contribution 2 years ago

Which of the following is not an excretory product? | Biology Past Questions

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.

Isaac provided a contribution 2 years ago

Soil micro-organisms are beneficial because of their | Biology Past Questions

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.

Isaac provided a contribution 2 years ago

The influence of soil on organisms in a habitat is referred to as | Biology Past Questions

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.

Isaac provided a contribution 2 years ago

The theory of survival of the fittest was propounded by | Biology Past Questions

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.

Isaac provided a contribution 2 years ago

If a baby is a female, her mother’s ovum must have been fertilized by a sperm car… | Biology Past Questions

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.

Isaac provided a contribution 2 years ago

The main structure in vertebrates that supports and protects the body is the | Biology Past Questions

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.......

Isaac provided a contribution 2 years ago

Which of the following animals can exist solely on the water they get from food … | Biology Past Questions

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.

Isaac provided a contribution 2 years ago

Which of the following is not a Newton’s law of motion? | Physics Past Questions

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.

Isaac provided a contribution 2 years ago

The organelles present in cells that are actively respiring and photosynthesizin… | Biology Past Questions

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.

Isaac provided a contribution 2 years ago

The cilia in paramecium are use for | Biology Past Questions

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"

Isaac provided a contribution 2 years ago

Which of the following is a waste product of an insect? | Biology Past Questions

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

Isaac provided a contribution 2 years ago

When it is cold, the blood vessels of the skin | Biology Past Questions

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.

Isaac provided a contribution 2 years ago

The insect trapping movements of the leaves of the venus fly trap is a behaviour… | Biology Past Questions

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.