Biology Past Questions And Answers
The cell of an onion bulb can be differentiated from a cheek cell by the presence of
- A. plasmalemma
- B. chloroplast
- C. cell wall
- D. nucleus
When fertilization occurs that leads to formation of a zygote, which of the following processes takes place?
- A. The tail of the sperm fuses with the egg cell
- B. Both tail and head of the sperm fuse with the egg cell
- C. The nucleus of the sperm fuses with the egg cell
- D. The egg cell develops on its own without the sperm
The number of plants species obtained from a population study of a garden is as follows: Guinea grass (15), Ipomea spp (5), sida spp (7) and Imperata spp (23). What is the percentage of occurrence of Imperata spp?
- A. 35%
- B. 16%
- C. 46%
- D. 23%
Which of the following best describes a colony of volvox?
- A. Asexually reproduced cells held together in a mass, but independent of each other
- B. Sexually reproduced cells held together in a mass, and dependent on each other
- C. Single free-living acellular units irrespective of their parental origin
- D. Several units of cells, held together by cytoplasmic strands and dependent on each other
Which type of association is shown by a fern growing on the stem of oil palm?
- A) epiphytism
- B) saprophytism
- C) commensalism
- D) symbiosis
The basis of growth involves the following processes except
- A. cell reduction
- B. cell division
- C. cell differentiation
- D. cell enlargement
Which of the following groups of organisms has kidney as the excretory organ?
- A. Fishes, amphibians, birds, man
- B. Fishes, amphibians, annelids, insects
- C. Fishes, reptiles, birds, tapeworm
- D. Fishes, protozoans, amphibians, man
The chromosomes of members of the kingdom Monera are within the
- A. nucleoplasm
- B. cytoplasm
- C. nucleus
- D. nucleolus
Secondary succession is much faster than primary succession because
- A. pioneer colonizers are more in number
- B. soil is already present
- C. secondary seres require less nutrients
- D. species competition is increased
Benedict's solution is used to test for _______
- A) Carbohydrate
- B) Lipid
- C) Protein
- D) Vitamins