Which of these allelic pairs represent homozygous dominant trait?
- A. TT
- B. Tt
- C. tt
- D. Bb
- E. bb
Which of the following statements is NOT true according to the first and second laws of thermodynamics ?
- A. In all energy conversions a certain amount is always lost as heat
- B. In any given ecosystem the energy transformations can be classified into catabolic and anabolic processes
- C. The energy at one trophic level is the same as the next higher or the one below it
- D. The sun is the ultimate source of energy in the universe
- E. The total energy in an ecosystem retains constant
Which organisms are NOT autotrophic?
- A. algae
- B. Ferns
- C. fungi
- D. grasses
- E. mosses
The genetic composition of an organism is termed
- A. an allele
- B. a cross
- C. a genotype
- D. a phenotype
- E. a hybrid
Use the information to answer this question.
I. Smoking
II. Sun drying
III. Freezing
IV. Canning
V. Salting
VI. Pasteurization
A method of food preservation that works on the principle of dehydration is
- A. I
- B. II
- C. I ,II ,and V
- D. II ,III, and V
- E. IV
Which ONE is not an adaptation for water conservation in plant found is arid region?
- A. absence of leaves
- B. leaves reduced to spines
- C. raised stomata
- D. sunken stomata
- E. thick stems
Which of these is NOT a method of asexual reproduction?
- A. budding
- B. fission
- C. fusion
- D. fragmentation
- E. layering
Which of these agencies do not have anything to do with conservation of natural resources?
- A. Family Economics Advancement Programme
- B. Federal Environmental Protection Agency
- C. Nigerian Conservation Foundation
- D. Nigerian Game Reserve Authorities
- E. World Wildlife Fund for Nature
Which of these organisms is most likely to have the least number if found within the same habitat?
- A. grasshopper
- B. hawk
- C. lizard
- D. snake
- E. toad
An example of sex-linked trait is
- A. ability to roll the tongue
- B. ability to taste PTC
- C. baldness
- D. blindness
- E. blood group
Which of these is NOT an excretory organ/organelle?
- A. flame cell
- B. kidney
- C. malpighian tubule
- D. nephridium
- E. spiracle
When both alleles in a heterozygous individual are fully expressed in the phenotype of the F, generation this phenomenon is described as
- A. co-dominance
- B. dominance
- C. incomplete dominance
- D. mutation
- E. recession
In a case of disputed paternity the most likely clue to resolving the problem is to match the ________________ of the baby with that of the father .
- A. blood group
- B. facial appearance
- C. finger print
- D. sex type
- E. skin color
An essential element whose deficiency in plants will result in poor growth, particularly of the roots, and is essential for cell well formation is
- A. calcium
- B. iron
- C. magnesium
- D. nitrogen
- E. phosphorus
Which of these is a liming factor with respect to human population size?
- A. emigration
- B. high standard of living
- C. immigration
- D. improved medicare
- E. natality
An example of a conditioned reflex is
- A. blinking of the eye-lids
- B. shout of exclamation
- C. knee jerk
- D. riding a bicycle
- E. twitching of facial muscles
Which of these traits shows discontinuous variation ?
- A. ability to roll the tongue
- B. colour of hair
- C. height of stem
- D. size of girth
- E. weight of organism
An instrument of measuring wind speed is called
- A. an anemometer
- B. a barometer
- C. a hygrometer
- D. a speedometer
- E. a thermometer
The group of micro-organisms that plays a vital role in the baking industry is
- A. algae
- B. bacteria
- C. fungi
- D. protozoa
- E. viruses
Which of the following agricultural practices will NOT promote soil conservation ?
- A. afforestation
- B. bush burning
- C. crop rotation
- D. manuring
- E. mulching
Which structure of the mammalian ear when removed will affect the maintenance of balance?
- A. auditory canal
- B. ear ossicles
- C. pinna
- D. semi-circular canals
- E. tympanium