All 20 questions from the Post-UTME Screening (Post-UTME) Biology 2017 Objective paper, with the correct answer and a full explanation for each. Free, no signup needed.
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In the mammalian kidney, the Bowman's capsules are located in the
Bowman's capsules, part of the nephron, are located in the renal cortex, the outer region of the kidney.
In the mammalian vertebral column, the correct order of arrangement of the vertebrae from the skull is
From the skull backward, the mammalian vertebral column is arranged: cervical, thoracic, lumbar, sacral, then caudal vertebrae.
Cell division resulting in the production of gametes is known as
Meiosis is the reduction division that produces haploid gametes from diploid parent cells.
A condition whereby the anther of a flower is matured long before the stigma is receptive is known as
Protandry is when the male parts (anthers) of a flower mature before the female parts (stigma) become receptive, promoting cross-pollination.
An example of a dioecious plant is
Pawpaw (papaya) is dioecious, meaning individual plants are either male or female, bearing only male or only female flowers.
Use the diagram below (a seedling with roots and shoot, with M pointing to the shoot tip and Z pointing to the root system) to answer this question and the next. The part labelled Z is for
The root system (labelled Z) primarily anchors the plant firmly in the soil, in addition to absorbing water and minerals.
The function of the part labelled M is to
The shoot/leaves (labelled M) carry out photosynthesis, synthesizing food for the plant.
If an animal is very active and has good muscular control, it is likely to have well developed
The cerebellum coordinates muscular activity and balance; animals with excellent muscular control typically have a well-developed cerebellum.
A neuron is made up of a
A typical neuron consists of a cell body, dendrites (which receive impulses) and an axon (which transmits impulses).
A person is suffering from an eye defect in which he can only see distant objects clearly. This eye defect may be corrected by using
Being able to see only distant objects clearly is short-sightedness (myopia), corrected using a concave (diverging) lens.
The cells responsible for the secretion of insulin in the human body are called
The islets of Langerhans, found in the pancreas, contain the beta cells that secrete insulin.
The endocrine gland responsible for the production of antidiuretic hormone is the
Antidiuretic hormone (ADH/vasopressin) is produced by the hypothalamus and released by the posterior pituitary gland.
Which of the following groups of characteristics best describes an ecosystem?
An ecosystem is best characterised by species diversity, stability, energy flow through trophic levels, and cycling of materials/nutrients.
An organism's abode in its specific biotic community constitutes its
An organism's habitat is the specific physical place/abode where it lives within its community.
The measurement of turbidity in a eutrophic pond is done by using a
A secchi disc is a simple tool lowered into water to measure water clarity/turbidity based on the depth at which it disappears from view.
Which of the following ecological factors is limited to the aquatic habitat?
Salinity (salt concentration) is a factor specific to aquatic (particularly marine/brackish) habitats.
Use the food web below (E -> G -> J -> M) to answer this question and the next. In the food chain E -> G -> J -> M, the least energy is found in
Energy decreases progressively along a food chain; the top (final) consumer, M, has the least available energy, as most is lost at each preceding trophic transfer.
The trophic levels occupied by organisms K are
Where an organism feeds at more than one level in a food web, it can occupy multiple trophic levels; here K is placed at the 2nd and 4th levels per the source diagram.
Cactus is an example of a
Cacti are adapted to survive in dry (arid) conditions, making them classic xerophytes.
In which of the following biotic communities are lianas very common?
Lianas (woody climbing vines) are especially common in tropical rain forests, where they climb up trees to reach sunlight in the canopy.
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