The center which controls respiratory activities the mammalian brain is the
- A. cerebrum
- B. olfactory lobe
- C. pituitary organ
- D. cerebellum
- E. medulla
Biconcave lenses are used in the correction of an eye defect called?
- A. myopia
- B. colour blindnes
- C. old age
- D. hypermetropia
- E. weakening of ciliary muscles
The following are connected with the movement of a reflex action (1) Central nervous (2) Muscles (3) Skin (4) Sensory nerve (5) Motor nerve. Which of the following sequences indicates a correct path?
- A. 1-2-3-4-5
- B. 2-1-4-5-3
- C. 3-4-1-2-5
- D. 4-1-5-2-3
- E. 3-4-1-5-2
Which of the following hormones is produced during fright or when agitated?
- A. Insulin
- B. Adrenalin
- C. Thyroxine
- D. Pituitrin
- E. Progesterone
which part of the human brain is concerned with reflexes controlling the rate of heart beat and breathing?
- A. Medulla
- B. Cerebrum
- C. Cerebellum
- D. Pineal body
- E. Olfactory lobe
The filament of spirogyra were put into equal volumes of sugar solutions X and Y. After 5 minutes, filaments from solution X had their cells contents rounded up while those from Y were unaffected. The experiment shows that
- A. solution X was stronger than Y
- B. solution Y was stronger than X
- C. Spirogyra used up the sugar in solution X
- D. solution X is good for stimulating sexual reproduction in Spirogyra
- E. solution Y was less contaminated than X
If the bark and phloem tissue of a woody shoot are peeled off by ringing, the whole plant will die eventually die because?
- A. water does not reach the leaves
- B. water and salts remained below the ring portion
- C. there is a withdrawal of water from the root by soil
- D. manufactured food does not reach the roots
- E. the roots store too much water
During excretion of urea there is also a corresponding re-absorption of water into the blood. This re-absorption takes place in the
- A. uriniferous tubules
- B. Bowman's capsule
- C. glomerulus
- D. malpighian capsule
- E. renal artery
In anaerobic respiration, glucose is converted to one of the following
- A. Carbon dioxide and water
- B. Carbon dioxide only
- C. Carbon dioxide and alcohol
- D. Alcohol and water
- E. water and acetic acid
The part of the cell solely responsible for respiration is the
- A. nucleus
- B. nucleolus
- C. mitochondria
- D. golgi apparatus
- E. endoplasmic reticulum
A green plant growing in a compost pit is feeding?
- A. holozoically
- B. parasitically
- C. saprophytically
- D. holophytically
- E. in none of the above ways
A potometer is used to determine the rate at which a shoot
- A. respires
- B. sucks air bubbles
- C. loses weight
- D. absorbs water
- E. transpires
Which one of the following parts of the mammalian body is most closely associated with the production of urine?
- A. Malpighian capsule
- B. Urinary bladder
- C. Ureter
- D. Vas deferens
- E. Urethra
For pollination and fruit formation, the essential part(s) of the flower should be the
- A. corolla
- B. ovary
- C. pistil (gynoecium)
- D. ovules
- E. receptacle
The conversion of excess amino acids into urea occurs in the
- A. Kidney
- B. pancreas
- C. villi
- D. liver
- E. spleen
Which of the following food substances is digested in the stomach?
- A. Carbohydrate
- B. Fats and oil
- C. Fats and proteins
- D. Proteins
- E. Carbohydrates and fats
The joint between the atlas and axis vertebrae allows for
- A. rotatory movement only
- B. up and down or nodding movements only
- C. rotatory and nodding movements
- D. no movement at all
- E. slight movement
A fresh Kolanut weighing 1g was put into salt solution. After 3 hour, the kolanut weighed 1.2g. This simple experiment demonstration that
- A. the salt solution is more concentrated that the cell sap of the kolanut
- B. the cell sap of the kolanut is more concentrated than the salt solution
- C. the salt solution has the same concentration as the cell sap of the kolanut
- D. kolanut cell can multiply in water
- E. the kolanut lost some water molecules to the salt solution
Water is required for seed germination to take place because it
- A. activates the enzymes
- B. softens the testa
- C. liberates energy for growth
- D. permits radicle growth
- E. allow oxygen to diffuse into the seed
A true fruit is formed from
- A. a fertilized ovary and other floral parts
- B. a fertilized ovary
- C. a fertilized ovary and calyx
- D. a fertilized ovary and fleshy receptacle
- E. an unfertilized ovary and other floral part
The organ through which food and oxygen are supplied to the human embryo and which also prevents harmful materials from reaching the embryo is the
- A. amnion
- B. uterus
- C. placenta
- D. umbilical cord
- E. fallopian tube