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Biology
UTME / JAMB 2017
Variation & Genetics (Heredity)
Solution
Gregor Mendel is regarded as the father of ______
A
variation
B
genetics
C
mycology
D
natural selection
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Gregor Mendel, through his work on pea plants, discovered the fundamental laws of inheritance.
He deduced that genes come in pairs and are inherited as distinct units, one from each parent. Mendel tracked the segregation of parental genes and their appearance in the offspring as dominant or recessive traits.
Source: Myschool Past Questions Archive (Record #46860)
Biology
UTME / JAMB 2017
Respiration & Gaseous Exchange
Solution
The most efficient respiratory structure used by free living protozoan is ________
A
body surface
B
gills
C
buccal cavity
D
spiracle
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
Protozoa do not have any organellae for the process of respiration. The limiting permeable membrane (body surface) acts as a respiratory surface.
The free molecular oxy¬gen from the surrounding media enters into the body by diffusion. Presence of a cyto¬chrome system has been demonstrated in protozoa.
Source: Myschool Past Questions Archive (Record #46861)
Biology
UTME / JAMB 2017
Basic Ecological Concepts, Ecosystems & Biomes
Carbon (iv) oxide is added to the atmosphere when ________?
A
plants build-up organic compounds
B
plants absorb mineral salts
C
sugars are completely broken down in animals
D
there is thunderstorm
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #46862)
Biology
UTME / JAMB 2017
Variety of Organisms & Classification of Living Things
Solution
The host of liver fluke are ______?
A
pig and snail
B
pig and sheep
C
sheep and snail
D
pig
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Liver fluke (Fasciola hepatica) is a parasite affecting a range of livestock and other species. Final hosts in which it can develop to sexual maturity include livestock such as sheep, cattle, horses, goats, alpacas and deer. People can be infected by eating water cress growing along creeks in fluke-infested country. While snails are intermediate hosts, sheep and pigs are definitive hosts.
Source: Myschool Past Questions Archive (Record #46863)
Biology
UTME / JAMB 2017
Reproduction in Plants & Animals
Diagram
Solution
Use the diagram to answer the question that follows
The part labelled 1 is the ________
Attached Figure / Diagram
A
carpel
B
sepal
C
petal
D
stigma
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
The part labelled 1 is the stigma and the part labelled 2 is the ovary.
Source: Myschool Past Questions Archive (Record #46864)
Biology
UTME / JAMB 2017
Population Ecology, Habitats & Conservation
Solution
Which of the following factors can reduce the population of a community?
A
Immigration
B
edaphic
C
predation
D
mutualism
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Predation include all interactions in which one organism consumes all or part of another. This includes predator-prey, herbivore-plant, and parasite-host interactions.
Migration is the movement of individuals of a species from one place to another.
Mutualism is the way two organisms of different species exist in a relationship in which each individual benefits from the activity of the other.
Edaphic factor is an abiotic factor relating to the physical or chemical composition of the soil found in a particular area.
Source: Myschool Past Questions Archive (Record #46865)
Biology
UTME / JAMB 2017
Reproduction in Plants & Animals
Solution
In mosses the structure which performs the function of water absorption is the _________?
A
root hairs
B
rhizoids
C
capsule
D
hyphae
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Mosses do not have a proper roots, but have threadlike rhizoids that anchor them to their substrate.
Rhizoids absorb water by capillary action, in which water moves up between threads of rhizoids and not through each of them as it does in roots.
hyphae are also important in the reproductive process in that they produce new spores while root hairs are important for the uptake of nutrients
Source: Myschool Past Questions Archive (Record #46866)
Biology
UTME / JAMB 2017
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
How does an enzyme affect the rate of a reaction?
A
It lowers the activation energy of the reaction, increasing the reaction rate.
B
It raises the activation energy of the reaction, decreasing the reaction rate.
C
It lowers the activation energy of the reaction, decreasing the reaction rate.
D
It raises the activation energy of the reaction, increasing the reaction rate.
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
Enzymes lower the activation energy of a reaction, increasing the reaction rate.
Source: Myschool Past Questions Archive (Record #46867)
Biology
UTME / JAMB 2017
Reproduction in Plants & Animals
Solution
Insects that goes through adult stage without becoming pupa are except ________
A
crickets
B
cockroach
C
grasshopper
D
bees
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
The first stage of incomplete metamorphosis is the egg. During this time, the insect will hatch into a form called a nymph.
The nymph is basically a small version of the adult insect.
Source: Myschool Past Questions Archive (Record #46868)
Biology
UTME / JAMB 2017
Reproduction in Plants & Animals
Solution
Insects that goes through adult stage without becoming pupa are except ________
A
crickets
B
cockroach
C
grasshopper
D
bees
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
The first stage of incomplete metamorphosis is the egg. During this time, the insect will hatch into a form called a nymph.
The nymph is basically a small version of the adult insect.
Source: Official Exam / Past Question Archive
Mathematics
UTME / JAMB 2016
Sets, Logic & Venn Diagrams
Diagram
Solution
The venn diagram shows a class of 50 students with the games they play. How many students play only two games?
Attached Figure / Diagram
A
15
B
16
C
20
D
18
medium Difficulty
Verified Correct Answer: Option A
Step-by-Step Mathematical Solution
Number of students that plays only two games = 4 + 8 + 3 = 15
Source: WAEC / JAMB / NECO Classroom Archive (Record #44756)
Mathematics
UTME / JAMB 2016
Statistics (Data Representation, Central Tendency & Dispersion)
Diagram
Solution
mark
2
3
4
Frequency
4
4
y
The table above shows the frequency distribution of marks obtained by a group of students. If the total mark is 48, find the value of y.
Attached Figure / Diagram
A
6
B
8
C
7
D
5
medium Difficulty
Verified Correct Answer: Option C
Step-by-Step Mathematical Solution
(2 x 4) + (3 x 4) + (4 x y) = 48
8 + 12 + 4y = 48
4y = 48 - 20
\(\frac{4y}{4}\) = \(\frac{28}{4}\)
y = 7
Source: WAEC / JAMB / NECO Classroom Archive (Record #44776)
Physics
UTME / JAMB 2016
Circular Motion, Gravitation & Simple Harmonic Motion
Solution
A satellite revolving around the earth is kept on its orbit by?
A
Centripetal forces only
B
Centripetal and frictional forces
C
Centrifugal forces only
D
Centripetal and centrifugal forces
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
The concept of centrifugal force can be applied in rotating devices, such as centrifuges, centrifugal pumps, centrifugal governors, and centrifugal clutches, and in centrifugal railways, planetary orbits and banked curves, when they are analyzed in a rotating coordinate system.
Source: WAEC / JAMB / NECO Classroom Archive (Record #44729)
Mathematics
UTME / JAMB 2016
Integration & Applications
Solution
Integrate \(\frac{2x^3 + 2x}{x}\) with respect to x
A
\(\frac{2x^3}{3}\) - 2x + k
B
x3 + 2x + k
C
\(\frac{2x^3}{3}\) + 2x + k
D
x3 - 2x + k
medium Difficulty
Verified Correct Answer: Option C
Step-by-Step Mathematical Solution
\(\int\) \(\frac{2x^3 + 2x}{x}\) = \(\int\) \(\frac{2x^3}{x}\) + \(\frac{2x}{x}\) = \(\int\) (2x2 + 2) dx
\(\frac{2x^2+1}{2 + 1}\) + 2x + k
= \(\frac{2x^3}{3}\)+ 2x + k
Source: Myschool Past Questions Archive (Record #44744)
Mathematics
UTME / JAMB 2016
Statistics (Data Representation, Central Tendency & Dispersion)
Solution
If the mean of 4, y, 8 and 10 is 7. Find Y?
A
6
B
10
C
7
D
9
medium Difficulty
Verified Correct Answer: Option A
Step-by-Step Mathematical Solution
\(\frac{4 + y + 8 + 10}{4}\) = 7
22 + y = 4 x 7
22 + y = 28
y = 28 - 22 = 6
Source: Myschool Past Questions Archive (Record #44745)