Which part of the curve represents the fastest rate of growth?
- A. K
- B. L
- C. M
- D. N
Fruits which develop without fertilization of the ovule are
- A. false
- B. multiple
- C. aggrgate
- D. parthenocarpic
Hypogeal germination is characterized by the
- A. emergency of the plumule out of the ground
- B. provision of nourishment by the endosperm
- C. elongation of the hypocotyl
- D. elongation of the epicotyl
In mammalian development, the function of the yolk is to
- A. supply nutrients to the embryo
- B. act as the shock-absorber to the foetus
- C. supply air to the embryo
- D. facilitates the process of excretion in the foetus
Double fertilization in higher plants is significant because it ensures the
- A. formation of a fertile embryo
- B. formation of a fertile embryo and the endosperm
- C. developement of the seed
- D. developement of the fruit
The function of the part labelled 1 is to
- A. secrete a fluid which lubricates the joint
- B. attach muscles to the bones at the joint
- C. bend the bones at the joint
- D. hold the joint in place
The part labelled 3 is the
- A. cartilage
- B. ligament
- C. synovial fluid
- D. bone
Which enzymes are contained in the pancreatic juice?
- A. Ptayalin, lipase and pepsin
- B. Maltase, erepsin and trypsin
- C. Renin, sucrase and lipase
- D. Amylase, lipase and trypsin
The bone of the neck on which the skull rests is known as the
- A. odontoid process
- B. axis
- C. atlas
- D. occipital condyle
Melanin and keratin are produced in the part labelled
- A. 2
- B. 3
- C. 4
- D. 5
The structure labelled 5 is the
- A. sweat gland
- B. sebaceous gland
- C. blood vessel
- D. nerve fibre
The excretory organ in insects is the
- A. kidney
- B. malpighian tubule
- C. flame cell
- D. nephridium
In the absence of oxygen, the pyruvic acid produced during glycolysis is converted to CO2 and
- A. water
- B. glycerol
- C. ethanol
- D. citric acid
Gaseous exchange in Aves occurs in the
- A. tracheoles
- B. bronchi
- C. air sacs
- D. trachea
The blood vessel which carries blood from the alimentary canal to the liver is the
- A. hepatic artery
- B. hepatic vein
- C. hepatic portal vein
- D. mesenteric artery
5 cm3 dilute sodium hydroxide solution and 5 cm3 one percent copper sulphate solution are added to a solution of food specimen. The purple colour which is observed shows the presence of
- A. glucose
- B. starch
- C. fat
- D. protein
The major site of photosynthesis in the leaf is the
- A. palisade parenchyma
- B. mesophyll parenchyma
- C. upper epidermis
- D. lower epidermis
Fungi are heterotropic because they
- A. have no leaves
- B. lack roots
- C. are filamentous
- D. lack chlorophyll
The flow of air and water in or out of the mesophyll layer of a leaf is controlled by the
- A. stomata
- B. lenticels
- C. air space
- D. guard cell
An onion is a bulb because it
- A. has a tuberous stem
- B. has a reduced stem and thick fleshy leaves
- C. has adventitous roots
- D. bears many buds at the nodes
Which of the following insects undergoes incomplete metamorphosis?
- A. Mosquito
- B. Termite
- C. Housefly
- D. Moth