Biology Past Questions And Answers
1171
In the root vascular system, the stele is directly surrounded by the
- A. pericycle
- B. cortex
- C. endodermis
- D. parenchyma
1172
In a population, food shortage may lead to
- A. an increased survival rate
- B. high reproduction rate
- C. intra-specific competition
- D. low rate of migration
1173
Gaseous exchange in the lungs takes place in the
- A. alveoli
- B. bronchi
- C. bronchioles
- D. trachea
1174
The following are formed in the bone marrow except L
- A) platelets
- B) basophils
- C) granulocytes
- D) lymphocytes
1175
In an agricultural ecosystem, the biotic component consist of
- A. crops, pests and beneficial insects
- B. crops, temperature and humidity
- C. pests, beneficial insects and water
- D. crops, water and soil
1176
Hydrostatic skeleton is the type of supporting system found in
- A.. mammals
- B. reptiles
- C. oligochaetes
- D. arthropods
1177
Which of the following groups contains a non-supporting structure in animals?
- A. Cartilage, bone and pseudopodia
- B. Pellicle, chitin and bone
- C. Humerus, ribs and cartilage
- D. Femur, pellicle and chitin
1178
I. Stomata --> Spirogyra
II. Alveoli --> Earthworm
III. Malpighian tubule -> Mammal
IV. Contractile vacuole -> Protozoa Which of the above structures is correctly matched with the organisms in which it is found?
- A. II
- B. I
- C. IV
- D. III
1179
The pancreas secretes enzymes for the digestion of
- A. fats, proteins and carbohydrates
- B. fats, vitamins and cellulose
- C. fats, carbohydrates and vitamins
- D. protein, cellulos and minerals
1180
Which of the following habitats cannot be used for the study of succession?
- A) abandoned farmland
- B) a pond
- C) savanna grassland
- D) well cultivated farmland