Biology Past Questions And Answers
941
Which of the following is the primary organ involved in gas exchange during respiration in humans?
- A. Diaphragm
- B. Bronchi
- C. Lungs
- D. Trachea
942
Which of the following organisms does not exist as a single free living cell?
- A. Paramecium
- B. Mold
- C. Amoeba
- D. Chlamydomonas
943
The most sensitive part of the retina is called
- A. blindspot
- B. conjuctiva
- C. fovea centralis
- D. choroid coat
944
The under secretion of thyroxine in children results in?
- A. goitre
- B. gigantism
- C. kwashiorkor
- D. cretinism
945
A universal recipient of blood belongs to blood group?
- A. O
- B. AB
- C. B
- D. A
946
Monocot stem differ from dicot stems in that monocot have
- A. no cambium
- B. no pith
- C. fewer vascular bundles
- D. phloems with parenchyma
947
During binary fission in lower organisms, the nucleus is known to undergo
- A. mitosis
- B. meiosis
- C. fragmentation
- D. mutation
948
Which of the following organs is primarily responsible for excretion in humans?
- A. Liver
- B. Pancreas
- C. Kidneys
- D. Lungs
949
The translucency spot in food test shows the presence of
- A. fats
- B. starch
- C. water
- D. protein
950
Which of the following instruments would be most appropriate in comparing the air pressure at different places in the habitat?
- A. Hygrometer
- B. Barometer
- C. Photometer
- D. Air pressure disc