Biology Past Questions And Answers
2171
Which of the following structures are characteristics of insect pollinated flowers?
- A. Dull coloured flowers with no nectar
- B. Very light numerous and pendulous stamen
- C. Brightly coloured petals, scent nectar
- D. Flowers are usually small and inconspicuous
2172
The level of organization of Amoeba and Euglena cell is ________?
- A. organ
- B. system
- C. cell
- D. tissue
2173
Which of the following will cause wilting in plants?
- A. Humidity
- B. Coldness
- C. Adequate soil water
- D. Excessive transpiration
2174
The main reason for immunizing children is to
- A. destroy pathogens in their bodies
- B. increase the production of white blood cells
- C. stimulate the production of antibodies
- D. simulate the production of antigens
2175
An example of organism which exists as a colony is
- A. Volvox
- B. paramecium
- C. euglena
- D. chlamydomonas
2176
The breaking down of food in the alimentary canal is called
- A. digestion
- B. egestion
- C. excretion
- D. ingestion
2177
During the eukaryotic cell cycle, what is the function of the G2 checkpoint?
- A. Prevents cells from undergoing mitosis until all chromosomes have completely replicated and any DNA damage has been repaired.
- B. Prevents sister chromatids from separating before each chromatid is secured to a spindle microtubule.
- C. Ensures that the cell has matured to a sufficient state before beginning synthesis.
- D. Ensures that each daughter cell has received the correct number of chromatids after cell division.
2178
In a population of living things, the parameters of size, height, weight and colours are examples of
- A. continuous variation
- B. non-heritable variation
- C. discontinuous variation
- D. physiological variation
2179
The ability of chameleon to change its colour rapidly is an adaptation for
- A. obtaining food
- B. attraction mate
- C. communication
- D. escaping detection
2180
Where is energy produced in the cell?
- A) nucleus
- B) nucleolus
- C) lysosome
- D) mitochondria