Biology Past Questions And Answers
601
Which of the following is the most advanced evolutionary development in plants?
- A. possession of unicellular structures
- B. development of flowers
- C. dispersal of spores
- D. development of secondary thickening
602
The movement response of a cockroach away from a light source can be described as
- A. positive phototaxism
- B. negative phototaxism
- C. negative phototropism
- D. positive phototropism
603
The natural process that produces adaptive evolutionary changes is
- A. Mutation
- B. Gene flow
- C. Genetic drift
- D. Natural selection
604
Vaccination is carried out in order to
- A. check the production of poison
- B. increase the activity of white blood cells
- C. increase the number of red blood cells
- D. stimulate the production of antibodies
605
__________ is an endoparasite
- A) Earthworm
- B) Tapeworm
- C) Mosquito
- D) Housefly
606
One of the advantages of outbreeding is
- A. pests tolerance
- B. disease resistance
- C. fast growth
- D. tall height
607
The type of placentation illustrated in the diagram below is

- A. marginal
- B. perietal
- C. axile
- D. basal
608
The stem of young herbaceous plants are kept upright mainly by
- A) osmotic pressure
- B) turgidity
- C) transpiration pull
- D) root pressure
609
In Mucor or Rhizopus carbohydrate is absorbed in the form of
- A) starch
- B) sucrose
- C) glycogen
- D) arabinose
610
Which of the following represents a phenotype?
- A. X-linked recessive
- B. Brown hair
- C. Autosomal dominant
- D. 5'GATACGG3'

