One of the factors that must be considered for safe blood transfusion is
social class of the donor
age of the recipient
rhesus factors of the donor and the recipient
nationality of the donor
weight of the recipient
Correct answer is C
No explanation has been provided for this answer.
| Maize cob | White | Pink | Red |
| I | 30 | 60 | 30 |
| II | 50 | 99 | 49 |
Which of the following ratios agrees with the result?
9:3:3
1:2:1
1:3:1
2:1:1
2:3:2
Correct answer is B
No explanation has been provided for this answer.
Which of the following is the underling principle in the adoption of biological control of pests?
Knowledge of agricultural practices by the farmer
relationship between plants and animals
the presence of poisonous chemicals in the farm
the relative population of plants and animals in the farm
The predator-prey relationship in the ecological community
Correct answer is E
No explanation has been provided for this answer.
Which of the following substances cannot control the growth of harmful microoganisms?
Antibiotics
Hypertonic salt solution
disinfectants
isotonic sugar solution
Antiseptics
Correct answer is D
No explanation has been provided for this answer.
The use of predators or parasites to control pests in the farm is known as
predator control
chemical control
biological control
animal control
parasitic control
Correct answer is C
No explanation has been provided for this answer.