Which of the following is not classified as a terrestrial habitat?
- A. Forest
- B. Guinea Savannah
- C. Afro Alpine
- D. Littoral zone
- E. Desert
Autotropic nutrition may be defined in terms of food obtained
- A. from other organisms in exchange for some products.
- B. by the breakdown of complex substances
- C. by an organism utilizing its own store of energy
- D. by synthesizing simple substances using energy from an external source
- E. in a synthesized form from other living organism.
The relationship between a herbivore and the bacteria which live in its caecum is known as
- A. parasitism
- B. symbiosis
- C. commensalism
- D. saprophytism
- E. predation
In a water culture experiment a plant showed poor growth and yellowing of the leaves. These symptoms
were probably due to the absence of
- A. calcium
- B. phosphorus
- C. iron
- D. zinc
- E. copper
Which of the following is not regarded as a micro-nutrient or trace element for plant growth?
- A. Phosphorus
- B. Zinc
- C. Boron
- D. Silicon
- E. Molybdenum
Even though some flowering plants contain accessory pigments which give them colours they still contain
the pigment
- A. melanin
- B. chlorophyll
- C. xanthrophyll
- D. carotene
- E. chlorocruorin.
Which of the following does not occur during photosynthesis?
- A. Energy from sunlight is absorbed
- B. Carbondioxide is evolved
- C. Glucose is synthesized
- D. Oxygen is given
- E. water is split
Which structure in the maize grain stores food?
- A. Radicle
- B. Embryo
- C. Cytoplasm
- D. Seed coat
- E. Endosperm.
Which of the following is not correct about a fruit? lt
- A. may contain many seeds
- B. is a mature ovary
- C. is covered by the pericarp
- D. may develop from the receptacle
- E. possesses only one scar.
Which of the following specialized structures are stimulated by touch, pressure, pain, heat and cold?
- A. Receptors
- B. Synapse
- C. Cell bodies
- D. Myelin sheath
- E. Relay neurones
The brain and the spinal cord make up the
- A. pheripheral nervous system
- B. automatic nervous system
- C. central nervous system
- D. somatic nervous system
- E. sympathetic nervous system
Auxins are produced in the
- A. petiole of leaves
- B. parenchyma of roots and shoots
- C. epidermis of roots and shoots
- D. apical regions of roots and shoots
- E. sclerenchyma tissues of roots and shoots
The pituitary is called ‘master gland’ because
- A. it is locatd in the brain
- B. its secretion are the more numerous than those of the other gland
- C. its secretion controls the other glands
- D. it is the only organ that produces hormone
- E. it regulates muscular movements
Which of the following statements is correct of hormones? Hormones are
- A. secreted into the blood through ducts
- B. secreted directly into the blood streem
- C. inactive chemical substance in the blood stream
- D. non-specific in their mode of action
- E. secreted at the site of the needed organ
Co-ordination is achieved in the body of mammals through the action of the
- A. endocrine and nervous systems
- B. skeletal and nervous systems
- C. muscular and nervous systems
- D. circulatory and nervous systems
- E. skeletal, muscular and nervous system
The pigment in the malphigian layer responsible for skin colouration is known as
- A. haemoglobin
- B. haemocyanin
- C. chlorocruorin
- D. haemoerythrin
- E. melanin
Which of the following statements on urine production is not correct?
- A. Concentrated urine is produced under the control of antidiuretic hormone
- B. The total volume of urine produced depends on the need for water excretion
- C. if there is excess intake of water, dilute urine is expected
- D. if there is a shortage of water in the body the volume of the urine produced is decreased
- E. in the presence of antidiuretic hormone dilute urine is produced
Deamination is the process during which
- A. excess amino acid is broken down into ammonia and keto acid
- B. fats and oil are converted into an emulsion for absorption
- C. excess glucose is converted and store as glycogen in the liver
- D. glycogen is reconverted into glucose through the action of glucagon
- E. excess amino acid is converted into proteins
The thoracic cavity is separated from the abdominal cavity by a sheet of muscle called
- A. pleural membrane
- B. intercostal muscles
- C. diaphragm
- D. pericardium
- E. epiglottis
Which of the following blood components has the greatest affinity for oxygen and carbondioxide?
- A. Blood plasma
- B. Leucocytes
- C. Thrombocytes
- D. Erythrocytes
- E. Lymphocytes
The pulmonary artery carries
- A. deoxygenated blood from the right ventricles to the lungs
- B. oxygenated blood from the right ventricle to the lungs
- C. oxygenated blood from the left ventricles to the ventricles to the right auricle
- D. deoxygenated blood from the left ventricles to the right auricles
- E. oxygenated blood from the lings to the right auricles