Biology Past Questions And Answers
3421
Which of the following scenarios is an example of cohesion?
- A. Water molecules stick to the surface of a mirror.
- B. Water sticks to the walls of blood vessels.
- C. Water molecules stay on the tip of a pine needle because the water is attracted to the surface of the needle.
- D. Water molecules stick to one another and form a bead
3422
The organelle involved in tissue respiration is the
- A. endoplasmic reticulum
- B. ribosome
- C. golgi body
- D. mitochondrion
3423
The mesophyll layer of a leaf consists of
- A. wax and cutin
- B. cells with lignified walls
- C. irregularly shaped collenchyma cells.
- D. photosynthetic parenchyma cells.
3424
Which of the following components make up an ecosystem?
- A. Decomposers, animals and non-living factors
- B. Living and non-living factors
- C. Plants and non-living factors
- D. Plants decomposers and non-living factors
3425
Very low annual rainfall, sparse vegetation, high day temperatures and cold nights are the characteristics of the biome known as
- A. swamp
- B. tropical forest
- C. southern guinea savanna
- D. desert
3426
An ecosystem is composed of all of the following except:
- A) Plants
- B) Animals
- C) Temperature
- D) Meadows
3427
Floating microscopic heterotrophs are mostly grouped as
- A. phytoplankton
- B. zooplankton
- C. microbes
- D. nekton
3428
Which of the following groups of animals do not possess a nervous system?
- A. Porifera
- B. Cnidaria
- C. Platyheminthes
- D. Nematoda
3429
Which of the following blood vessels have valves?
- A. Capillary
- B. Artery
- C. Vein
- D. Arteriole
3430
Which of the following is an evidence of photosynthesis?
- A. Absorption of light
- B. Formation of starch
- C. Availability of carbon dioxide
- D. Splitting of water molecules