Biology 2007 Jamb Examination
Question 21
Pineapple is an example of
C. Composite fruit
Pineapple is a composite (multiple) fruit formed from a cluster of flowers called an inflorescence. Each flower produces a small fruit, and these fuse together to form the pineapple.
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Question 22
The correct sequence of the movement of urea during urine formation is
A. Correct sequence
Urea is filtered from the blood at the glomerulus into Bowman's capsule. It passes through the proximal convoluted tubule, Henle's loop, distal convoluted tubule, and finally enters the collecting tube.
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Question 23
The waste product of plants used in the conversion of hide to leather is
C. Tannin
Tannin, a plant phenolic compound, is used in leather production to convert animal hides into durable leather through the process called tanning.
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Question 24
Which of the following uses diffusion as the principal method of gaseous exchange?
D. Earthworm
Earthworms exchange gases through their moist skin by diffusion. Oxygen diffuses in and carbon dioxide diffuses out, without the use of lungs or tracheae.
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Question 25
Which of the following has the most primitive respiratory system?
A. Snail
Snails have a simple respiratory system, often just a vascularized cavity or lung sac. This is considered more primitive than gills in fish, tracheae in insects, or lungs in mammals.
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Question 26
Which of the following is a water medium necessary for fertilization?
C. Ferns
Fertilization in ferns requires water because sperm cells are flagellated and swim to reach the egg. Conifers and angiosperms use pollen for transfer instead.
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Question 27
The chromosomes of members of the kingdom Monera are within the
B. Cytoplasm
Monerans (bacteria) are prokaryotic organisms that lack a defined nucleus. Their single circular chromosome is located in the cytoplasm.
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Question 28
The process of shedding the exoskeleton of an arthropod is known as
C. Ecdysis
Ecdysis is the process by which arthropods periodically shed their rigid exoskeleton to grow larger. This is essential because their exoskeleton does not expand.
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Question 29
Which of the following is common to the mosquito, housefly, and blackfly?
A. Complete metamorphosis
All three insects undergo holometabolous development, with egg, larva, pupa, and adult stages.
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Question 30
An accurate identification of a rapist can be carried out by conducting a
B. DNA analysis
DNA profiling provides a unique genetic fingerprint for each individual (except identical twins) and is the most accurate method for identifying a perpetrator.