All 15 questions from the Post-UTME Screening (Post-UTME) Biology 2008 Objective paper, with the correct answer and a full explanation for each. Free, no signup needed.
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Increasing complexity due to multicellularity first appeared in this animal group
Coelenterates (Cnidaria) represent one of the earliest truly multicellular animal groups with increased complexity.
In the angiosperms, the sieve tube members are living non-nucleated, but they are usually accompanied by
Companion cells, connected to sieve tube members, support their metabolic functions since sieve tubes lack nuclei.
Abscisic acid is a chemical that prepares plants for
Abscisic acid promotes dormancy and leaf/fruit abscission (leaf fall).
The formula below represents C6H12O6 → C2H5OH + CO2 + ATP
Glucose converting to ethanol and CO2 (releasing ATP) is the process of fermentation.
In any population, any specific allele will mutate at one time or another, usually to a non functional or harmful form. The proportion of gametes carrying new mutant alleles of a given locus is called
This proportion is, by definition, the mutation rate.
In mosses, the sporophyte generation is highly prominent, producing spores in a cone-like structure called
In mosses, the sporophyte's spore-producing capsule develops from the archegonium.
When Sudan III solution is boiled with a solution of food substances, it gives a colour black precipitate showing the presence of
Sudan III/IV is a classic test reagent for detecting fats and oils.
Plants adapted to life in salty marsh are known as
Plants adapted to saline habitats are halophytes.
A circulatory system that does not allow mixing of oxygenated blood in the mammalian heart is referred to as
Mammals have a double circulatory system with separated pulmonary and systemic circuits, preventing mixing.
In a pyramid of numbers, it is common to have____with the smallest number of individuals
Tertiary (top) consumers are typically the fewest in number in a pyramid of numbers.
In blood transfusion, agglutination occurs when
Agglutination (clumping) occurs when antibodies bind to matching (incompatible) antigens on donor red cells.
Genetic counseling is important when marriage is planned between a
An Rh- mother carrying an Rh+ fetus (from an Rh+ father) risks haemolytic disease in the baby, making genetic counseling especially important for this pairing.
One of these animal groups contains acoelomate members
Cnidarians (coelenterates) are acoelomate — they lack a true body cavity.
The enzyme invertase will hydrolyse sucrose to give
Invertase hydrolyses sucrose into its two monosaccharide components: glucose and fructose.
A flower that has both stamen and pistil is said to be
A flower bearing both male (stamen) and female (pistil) parts is called 'perfect'.
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