If a germinating seed is attached horizontally on a revolving klinostat, what will be the effect of the seedling after three days? The
- A. plumule will curve vertically upward while the radicle will curve towards the ground
- B. plumule and radicle will not show any curvature
- C. radicle will curve towards the ground while the plumule will not show any curvature
- D. plumule will curve vertically upward while the radicle will not show any curvature
- E. plumule and radicle will curve towards the ground
Over-secretion of thyroxin is likely to lead to
- A. thinness in body
- B. sluggishness
- C. cretinism in infant
- D. reduced metabolism
- E. dwarfism
Growing radicles of seddlings are
- A. negatively phototropic
- B. positively phototropic
- C. negatively geotropic
- D. negatively hydrotropic
- E. positively phototactic
The pituitary is regarded as the master gland because
- A. it is locatd in the brain
- B. its secretion are the most numerous
- C. its secretion control other endocrine glands
- D. it is the biggest endocrine gland
- E. it controls the activities of the brain
Infective hepatitis is a disease of the
- A. heart
- B. kidney
- C. liver
- D. stomach
- E. pancreas
The following are the activities of the liver except
- A. production of heat
- B. manufacture of bile
- C. detoxication of alcohol and drugs
- D. maintenance of osmotic balance
- E. deamination of excess nitrogenous substance
Kidney stone is a disease of the Kidney that result in the
- A. blockage of the tubules by solid particles
- B. passing out useful materials of the body fluid within the urine
- C. presence of large quantity of water in urine
- D. passing out hormones in the urine
- E. prevention of urine production
Which of the following parts of the mammalian skin is directly is directly involved in excretion?
- A. Sebaceous gland
- B. Sweat gland
- C. Hormy layer
- D. Hair follicle
- E. Malphigian layer
The upper part of the trachea in mammals is called
- A. palate
- B. epiglottis
- C. larynx
- D. glottis
- E. bronchus
The pulmonary vein carries
- A. oxygenated blood from right ventricles to the lungs
- B. oxygenated blood from lungs to the left auricle
- C. deoxygenated blood from the lungs
- D. oxygenated blood from lungs to the right auricle
- E. deoxygenated blood from the right ventricle to the lungs
Which of the following tissues is not found in the stem and root of monocotyledons?
- A. Xylem
- B. Cambium
- C. Pith
- D. Cortex
- E. Pericycle
Muscles are attached to bones by means of
- A. ligament
- B. cartilage
- C. synovial membrane
- D. tendons
- E. connective tissue
The following are functions of the skeleton except
- A. providing support for the body
- B. protection of delicate internal organs
- C. maintenance of the shape of the body
- D. providing attachment for muscles
- E. controlling growth rate in animals
The process of anearobic respiration of yeast in sugar solution is known as
- A. oxidation
- B. fermentation
- C. tissue respiration
- D. alcohol production
- E. decomposition
Which of the following statement is correct about diffusion?
- A. it involves movement of water molecules only
- B. Molecules move from a region of higher concentration to a region of lower concentration
- C. differentially permeable membrane must be present for diffusion to occur
- D. It involves when a solute can no longer dissolve in a solvent of only solute molecules into the Bowman's capsule
- E. It occurs when a solute can no longer dissolve in a solvent
The mechanism of gaseous exchange in living organisms is essentially by
- A. osmosis
- B. inhalation
- C. diffusion
- D. exhalation
- E. breathing
Spirogyra is regarded as a multicellular plant because
- A. its cells are linked together by cytoplasmic strands
- B. its cells are joined to form organs
- C. the cylindrical cells are linked end to end
- D. the filaments consist of one cell only
- E. it is an algea containing large vacuoles
The organelle which eliminate water from the body of protozoa is
- A. plasma membrane
- B. contractile vacuole
- C. cell wall
- D. protoplasm
- E. nucleus
The cell is a functional unit of living organisms because
- A. multicellular organisms are made up of cells
- B. all cells in a multicellular organism function as a single cell
- C. the function of a multicellular organism is the sum total of the functions of its constituent cells
- D. the function of a single cell is superior to that of the multicellular organism
- E. the cells of a multicelullar organism are similar in structure