External ears of mammals consist of
- A. pinna and tympanum
- B. pinna only
- C. auditory meatus only
- D. auditory meatus and pinna
- E. auditory meatus and tympanum
Which of the following tissue are made up of dead cells?
- A. Meristematic
- B. Xylem vessels
- C. Cambium
- D. Mesophyll
- E. Palisade
when an operculate fish breathes it takes in water through the
- A. mouth and passes it out through the same way
- B. mouth and passes it out through the operculum
- C. operculum and passes it out through the mouth
- D. operculum and passes it out through the nostrils
- E. nostrils and passes it out through the operculum
Which of these statements is NOT true of insects?
- A. They are anthropods
- B. Their body is divide into three distinct regions of head, thorax and abdomen
- C. Their thorax comprises three segments, only two of which bear a pair of appendages each
- D. Respiration is by means of trachea
- E. They undergo metamorphosis
The parts of the mammalian eye that strongly bend light rays are the
- A. cornea and the lens
- B. cornea and aqueous humour
- C. cornea and vitreous humour
- D. lens and aqueous humour
- E. lens and vitreous humour
In man, identical twins occur when
- A. An ovum is fertilized by a sperm and then divide into two, each forming a separate embryo
- B. an ovum fertilized by two sperms and then divides into two, each forming an embryo
- C. two ova are fertilized at the same tine each forming an embryo
- D. two ova are fertilized by a single sperm each forming an embryo after fertilization
- E. one ovum first divides into two and each half is fertilized by a sperm before developing into an embryo
ONE of the major causes of haemophilia is lack of
- A. firbrinogen
- B. amylase
- C. white blood corpuscles
- D. red blood corpuscles
- E. plasma
In the enzyme (amlyase) reactions of starch → sugar
starch is referred to as the
- A. substrate
- B. product
- C. enzyme
- D. enzyme-substrate complex
- E. reaction mixture
Treatment of a poor soil with lime supplies
- A. Sulphur
- B. Calcium
- C. Phosphorus
- D. Sodium
- E. Nitrogen
Refrigeration, as a method of preservation, has ONE of the following characteristics:
- A. Kills all the bacteria
- B. Kill most of the bacteria
- C. Makes the bacteria inactive
- D. Dries food
- E. Hydrolyses food
Which of the vertebra has a projection called odontoid process?
- A. Atlas
- B. Axis
- C. Thoracic
- D. Lumber
- E. Caudal
Which of the following pairs are the products of sucrose hydrolysis?
- A. Glucose + glucose
- B. Fructose + fructose
- C. Glucose + fructose
- D. Galactose + glucose
- E. Fructose + galactose
The main function of the swim-bladder is for
- A. Swimming
- B. Detecting sound
- C. Buoyancy
- D. Breathing
- E. Reproduction
Roots of plants are normally
- A. Positively phototropic
- B. Negatively geotropic
- C. Negatively hydrotropic
- D. Positively hydrotropic
- E. Negatively chemotropic
An onion bulb stores its food in the
- A. Stem
- B. Leaves
- C. Roots
- D. Cotyledon
- E. Branches
A grass hopper respires by the means of its
- A. Lung-books
- B. Gills
- C. Lungs
- D. Antennae
- E. Tracheal tubes
A tapeworm has no alimentary canal because
- A. It is autotrophic
- B. It does not feed
- C. It has no enzymes
- D. Its body absorbs digested food
- E. The suckers on the scolex suck blood
The glottis is the opening which leads to the
- A. Oesophagus
- B. Larynx
- C. Nostrils
- D. Pharynx
- E. Mouth
If a 26 year old blind man married a young one-eyed woman and they had four children, how many of them would be blind like there father?
- A. All
- B. 3
- C. 2
- D. 1
- E. none
A married couple has 10 children and they are all girls. Which of the following is the CORRECT explanation?
- A. The woman is incapable of producing male children
- B. The man’s sperms are very weak
- C. The man is not athletic enough
- D. The Y component of the men’s sex chromosomes was always involved
- E. The X component of the man’s sex chromosomes was always involved
If a tall man (TT) marries a dwarf woman (gg) and they have four male children, the offspring will be?
- A. All short
- B. Three short and one tall
- C. Two short and two tall
- D. One short and three tall
- E. All tall