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Biology
UTME / JAMB 2019
Supporting Tissues & Skeletal System
Solution
Only specially adapted micro-organisms are found in
A
Salty water
B
Humid air
C
Moist soil
D
Mouth cavities
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
Halophiles are organisms that thrive in high salt concentrations. The adaptations of halophile organisms to their environment are:
(a) The integrity of non-halophile macromolecules is compromised, and the flow of water out of the cell produces a Turgor effect. • (b) Moderate halophiles maintain their structures via the synthesis of compatible organic solutes. • (c) Extreme halophiles maintain their structures via equilibration of cellular and environmental salt concentrations.
Source: Myschool Past Questions Archive (Record #55957)
Biology
UTME / JAMB 2019
Population Ecology, Habitats & Conservation
Solution
Plants which can survive in extremely dry places are called
A
Mesophytes
B
Xerophytes
C
Hydrophytes
D
Angiosperms
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
They are called Xerophyte because they are species of plant that has adaptations/adaptive features like waxy cuticles which enables them to survive in extremely dry land.
Source: Myschool Past Questions Archive (Record #55958)
Biology
UTME / JAMB 2019
Basic Ecological Concepts, Ecosystems & Biomes
Solution
The presence of ______ for swimming in a tad-pole enables it to adapt in an aquatic habitat.
A
Gills
B
Swim bladder
C
Tail
D
Fins
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Tadpole's ability to swim and adapt to an aquatic habitat is due to the presence of its tail.
Source: Myschool Past Questions Archive (Record #55959)
Biology
UTME / JAMB 2019
Variety of Organisms & Classification of Living Things
Solution
Possession of thin membrane enables a tapeworm to
A
Fasten themselves to the wall of the host's intestine
B
Lay numerous eggs
C
Absorb digested food from the host's intestine to their system
D
Shield themselves inside the host's intestine with anti-enzymes in order to avoid being digested
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
The tapeworm possesses a thin membrane mostly because of it absorption of digested food from the intestine of the host.
Source: Myschool Past Questions Archive (Record #55960)
Biology
UTME / JAMB 2019
Digestive System & Feeding Mechanisms
Solution
Which of the following juices contains the enzyme ptyalin?
A
Gastric juice
B
Succus
C
Pancreatic juice
D
Saliva
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
The saliva contains an enzyme called ptyalin which helps to hydrolysis of starch to maltose partially
Source: Myschool Past Questions Archive (Record #55961)
Biology
UTME / JAMB 2019
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
Which of the following essential substance is contained in vegetable?
A
Chlorophyll
B
Glucose
C
Mineral Salts
D
Carbon dioxide
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Vegetable contains mineral salts like magnesium, copper etc which is very essential for body growth.
Source: Myschool Past Questions Archive (Record #55962)
Biology
UTME / JAMB 2019
Growth, Micro-organisms & Public Health
Solution
Good quality food will perform the following functions in human except
A
Supplying energy
B
Providing resistance against malaria
C
Maintaining health
D
Sustaining growth
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Good quality food cannot provide resistance to malaria because it does not contain anti-malaria substance it only and good propr growth.
Source: Myschool Past Questions Archive (Record #55963)
Biology
UTME / JAMB 2019
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
Which of the following is considered to be the first product of Photosynthesis?
A
Protein
B
Starch
C
Energised Chlorophyll
D
Hydroxyl ions
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Starch is the main and first product formed during photosynthesis because the simple sugar formed is partly used by the plant and excess of it is converted into starch immediately for storage and the starch is transported to other parts of the plant through the phloem vessels for storage.
Source: Myschool Past Questions Archive (Record #55964)
Biology
UTME / JAMB 2019
Transport System in Plants & Animals
Solution
Which of the blood corpusles are irregular and amoeloid in shape
A
Leucocytes
B
Erythrocytes
C
Thrombocytes
D
Plasma
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
Leucocytes are also called white blood cell. They are irregular and amoebaoid in shape.
Source: Myschool Past Questions Archive (Record #55965)
Biology
UTME / JAMB 2019
Excretion & Homeostasis
Solution
Which organ removes the largest quantity of water from the blood?
A
Lung
B
Skin
C
Kidney
D
Intestine
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Kidney is an organ that perform lots of function one of which it helps in removing large quantity of water from the blood in order to maintain normal balance in the body system
Source: Myschool Past Questions Archive (Record #55966)
Biology
UTME / JAMB 2019
Variety of Organisms & Classification of Living Things
Solution
The movement of blood between the heart and all other parts of the body beside the lungs is
A
Double circulatory system
B
Pulmonary system
C
Single circulation
D
Systemic circulation
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Systemic circulation involves the movement of blood between the heart and all other parts of the body besides the lungs.
Source: Myschool Past Questions Archive (Record #55967)
Biology
UTME / JAMB 2019
Variation & Genetics (Heredity)
Solution
The change in the genetic make up of an organism resulting in an inheritable characteristics which is new is
A
Mutation
B
Locus
C
Hybrid
D
Diploid
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
Mutation involves the changes in the genes of an organism due to some factors resulting in a new character that can be inherited.
Source: Myschool Past Questions Archive (Record #55968)
Biology
UTME / JAMB 2019
Variation & Genetics (Heredity)
Solution
The organic molecule(s) present in the nucleus is/are
A
DNA
B
DNA and ATP
C
ATP and RNA
D
RNA
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
DNA is located in the nucleus of cells. It is responsible for the storage of organisms's hereditary traits and helps in directing the day to day metabolic activities of each cell in the organic.
Source: Myschool Past Questions Archive (Record #55969)
Biology
UTME / JAMB 2019
Variation & Genetics (Heredity)
Solution
Albinism is an expression of trait controlled by
A
Chromosomes
B
Recessive genes
C
Dominant genes
D
Mutation
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Albinism is the condition in which the skin of an animal is non-pigmented because of lack of the pigment called Melanin. It is controlled by Recessive genes.
Source: Myschool Past Questions Archive (Record #55970)
Biology
UTME / JAMB 2019
Reproduction in Plants & Animals
Solution
The male sex cells also called gametes are produced in the testes by a process called
A
Gametogenesis
B
Implantation
C
Spermatogenesis
D
Spermatozoa
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Spermatogenesis is the process whereby male sex cells or gametes (sperms) are produced in the testis.
Source: Myschool Past Questions Archive (Record #55971)