Biology Past Questions And Answers
At what point does transcription occur in relation to gene expression?
- A. It is the last step in this process
- B. Transcription is unrelated to gene expression
- C. It is the step following translation
- D. It is the first step
The specific number of chromosomes in each somatic cell is represented by
- A. 2N
- B. 23
- C. 2N
- D. N
In which of the following organisms is parental care manifested?
- A. Tilapia
- B. Toad
- C. Cockroach
- D. Snail
Double fertilization in higher plants is significant because it ensures the
- A. formation of a fertile embryo
- B. formation of a fertile embryo and the endosperm
- C. developement of the seed t
- D. developement of the frui
The soil with highest water-retaining capacity is
- A. Clayey Soil
- B. Stoney soil
- C. Sandy soil
- D. Loamy Soil
Which is the correct order in an evolutionary sequence for the following plant groups?
- A) Bacteria - ferns - algae - mosses - seed plants
- B) Bacteria - ferns - mosses - algae - seed plants
- C) Bacteria - algae - mosses -ferns - seed plants
- D) Bacteria - mosses- algae - ferns - seed plants
A water medium is necessary for fertilization in
- A. fungi
- B. conifers
- C. ferns
- D. angiosperms
One of the most effective ways of controlling guinea worm is by
- A. treating the disease
- B. public enlightenment campaigns
- C. accelerating rural developmnet
- D. provision of portable drinking water
Which of the following substances is not complex carbohydrate?
- A. Glycogen
- B. Cellulose
- C. Starch
- D. Glucose
(a). Name the gases involved in the photosynthesis of a plant.
(b) State one role each of the gases named in 2 (a).
(c) (i) What is a variegated leaf?
(ii)Which part of the variegated leaf would test positive when treated with iodine solution?
(iii) State two reason for the answer in 2(c) (ii).
(iv) Name one mineral element required by plants for the formation of the part that would test positive in 2(c)(ii).
(d) The table below indicates different methods by which organism obtain food. Place the following organism under the heading in the table below: Human, Mushroom, Venus flytrap, Waterleaf plant, Tapeworm, Elephant grass, Housefly, Lichen, Spirogyra, Rhizopus.
| Holozoic | Parasitic | Symbiotic | Saprophytic | Autotrophic |