Biology Past Questions And Answers
A yellow maize is planted and all the fruits obtained are of yellow seeds. When they are croos-bred, yellow seeds and white seeds are obtained in a ratio 3:1 . The yellow seed is said to be
- A. non-heritable
- B. sex-linked
- C. a recessive trait
- D. a dominant trait
A group of organisms of different species living in a particular area is described as
- A) colony
- B) community
- C) population
- D) niche
The media of transportation in living things include all but
- A) Cytoplasm
- B) Water
- C) Eosin
- D) Blood and lymph
The significance of mitosis includes all of the following except
- A) genetic stability
- B) growth
- C) cell replacement
- D) degeneration
The abilty of a chameleon to change its colour is an adaptive future for
- A. attraction
- B. defence
- C. display
- D. attack
The basking of Agama lizards in the sun is to
- A. change the colour of their body
- B. raise their body temperature to become active
- C. fight to defend their territories
- D. attract the female for courtship
Hassan and Hussain are identical twins but Hassan grows taller and fatter from Hussain. This is probably because?
- A. Hassain inherits genes for tallness and fattness from the father
- B. They have dissimilar genotypes
- C. Hussain is endowed with genes for shortness and thinness
- D. They are raised in different environment
The rate of decomposition of organisms is faster in the tropical rain forest than in other biomes because
- A. of the relatively constant daylight
- B. there are more plants per square feet
- C. of abundance of water
- D. of constant cool temperature
The most important plant hormone is
- A. cytokinin
- B. abscisic acid
- C. auxin
- D. gibberellin
Which of the following disease is not sexually transmitted?
- A. Gonorrhea
- B. Herpes
- C. Influenza
- D. Syphilis