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JAMB Biology Practice Test Questions and Answers for Today
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1. In the angiosperm, the living non-nucleated sieve tube members are usually accompanied by one of the following: A. Cork cambium B. Phloem rays C. Vascular cambium D. Companion cells
SUMMARY: D (companion cells)
2. Abscisic acid is a substance that helps plants get ready for different processes, including fruit ripening, seedling emergence, leaf fall, and reproduction (leaf fall)
3. Any particular allele will eventually mutate in any population, usually to a non-functional or harmful form. The lethal genotype is also known as the following: A. the mutation rate B. the selection coefficient C. the relative fitness D. the proportion of gametes carrying new mutant alleles of a given locus (lethal genotype)
4. The saprophyte generation is very prevalent in mosses and produces spores in a cone, such as A. gametophyte B. strobilus C. antheridium D. archegonium. ANSWER: B (strobilus)
5. When osmotic acid is boiled with a solution of food ingredients, it produces a colorless precipitate that is black in appearance and indicates the presence of A. fats and oils B. proteins C. amino acids D. starch (fat and oil)
6. Plants that can survive in salty environments are known as A. hydrophytes B. halophytes C. epiphytes D. (halophytes)
7. A circulatory system is described to as open, haemocoelic, solitary, or closed if it prevents the mixing of oxygenated blood in the mammalian heart.
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SUMMARY: D (closed)
8 It is typical for the least number in a pyramid of numbers to be A. secondary consumers B. tertiary consumers C. primary consumers D. primary producers
SUMMARY: B (tertiary consumers)
9. A. Mollusca is a member of one of these animal groups and is an acoelomate.
Answer: B. Coelenterata C. Arthropoda D. Reptilian (Coelenterata)
10. A flower is said to be A. perfect B. imperfect C. pistillate D. staminate if it possesses both a stamen and a pistil.
REPLY: A (perfect flower)
11. The following organisms typically have sting cells: A. flatworm B. hydra C. snails D. paramecium
SUMMARY: B (hydra)
12. The fern sporangium’s annulus aids in the following processes: A. spore dispersal B. mineral salt conduction C. light energy trapping D. water retention
REPLY: A (spore dispersal)
13. A. Radula B. Mantle C. Tentacle is the land snail’s respiratory organ.
D. foot RESPONSES: B (mantle)
14. Fish gill rakers participate in
Answer: A. eating B. breathing C. swimming D. diffusion (feeding)
15. Which of the following elements are shared by protein, carbohydrate, and lipid? A. hydrogen B. sulphur C. nitrogen D. phosphorous (hydrogen)
Which of the following is an excretory substance produced by plants?
Oil, cytokinin, resin, amino acids, and so on (resin)
17. A. sorghum B. maize C. millet D. groundnut exhibit epigeal germination. ANSWER: D (groundnut)
Which of the following characters DOES NOT have a sexual component?
A. River ostracism
Answer: A. Baldness B. Haemophilia C. Color blindness D. (river blindness)
Which of the following illnesses can be avoided with vaccination?
Syphilis, malaria, TB, and acquired immune deficiency syndrome are just a few.
SUMMARY: C (tuberculosis)
Nitrogen-fixing microorganisms in leguminous plants coexist harmoniously in the following structures: A. root nodules B. tap roots C. branch roots D. root hairs (root nodules)
21. In the vertebrate class, frogs and toads are grouped together as?
Answer: C. Aves, reptiles, amphibians, and mammals (Amphibians)
22. A. Na+ and B. K+ aid blood coagulation.
The correct answer is C (Ca2+).
23. Corn loses its taste when it is stored. This occurs due to the following factors: A. reconversion of polysaccharide into soluble sugar; B. rise in sugar concentration brought on by storage; C. conversion of sugar to polysaccharide; and D. destruction of the enzymes necessary for the conversion.
REPLY: A (polysaccharide is reconverted into soluble sugar)
24. One of these arthropods is a transmitter of microbes, including viruses.
Answer: D. termite B. ant C. bee D. flea (flea)
25. The enzyme that causes newborn milk to curdle is known as A. pepsin B. renin C. trypsin D. urease
SUMMARY: B (renin)
26. The sebaceous gland’s job in mammals is to do one of the following: A. create sweat; B. produce an oily material; C. secrete water; D. secrete sodium. ANSWER: B. (produce an oily substance)
27. The Cochlea, Malleus, and Utriculus in men may sense head movement and postures.
Answer: D. semicircular canals (semi-circular canals)
The maize grain is a fruit, not a seed, as it has a
A. is a monocotyledon B. is generated from an ovary C. has a big endosperm D. lacks a plumule and radicals
SUMMARY: B (is formed from an ovary)
29. An organism’s distinguishing feature is known as its
Answer: A. phenotype B. genotype C. anatomy D. morphology
30. In mammals, the central nervous system receives stimulus from the receptor through the
A The moto neurons,
B. dendrites,
C. effector muscles
Answer: D. sensory neurons (sensory neurons)
31. What are germinations that cause cotyledons to emerge above ground called?
Answer: C. Hypocotyls, Epicotyls, Epigeal, and Hypogeal (epigeal)
Which food chains are in the right order, 32?
A. weeds, tadpoles, bugs, and people
B. plants, tadpoles, fish, insects, and people
Tadpoles, bugs, weeds, man, and fish are examples of other organisms ( weeds, tadpoles, fish, beetle, man)
33. The primary and secondary hosts of bilharzia are, respectively, A fish and a man B a man and a dog C a snail and a man D a man and a snail (man and snail)
34. Humus, water, and microorganisms are the sources of the mineral particles in the seed.
D. Organic material (organic matter)
A. 46.7 B. 25.0 C. 20.0 D.
30.0 ANSWER: D (30%). 35. The starting volume of water in the bag of dry soil was 50 ml, and the quantity that drained through was 35 ml. Therefore, the percentage water content of the totally soak soil is:
Find the non-hereditary mutation from the following list of mutation categories.
A mutation in the genes B a somatic mutation C a germline mutation
Gametic mutation RESPONSE: B (somatic mutation)
37. In a cell, ribosomes, lysosomes, and mitochondria house the majority of the digestive enzymes.
plastids REPLY: B (lysosomes)
Which of the following ecosystems has the greatest variety of species? 38.
A. desert; B. savannah grassland; C. tropical rain forest; D. tropical forests
REPLY: A (tropical rainforest)
39. Lack of protein in a child’s diet can be immediately seen because: A) kids have trouble chewing meat; B) kids have trouble storing protein; C) kids need protein for energy; D) kids need protein for growth and repair.
SUMMARY: D ( protein is responsible for growth and repairs )
40. A. nastic movement is the term used to describe a plant’s growth response to a light gradient.
Geotropism, hydrotropism, phototropism, and B
SUMMARY: D (phototropism)
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