In medicine, bacteria have proved very useful due to the production of
nitrate
antibiotics
cured tobacco
tanned leather
Correct answer is B
No explanation has been provided for this answer.
Fresh milk is often kept in refrigerated vehicles, for distribution to customers in order to
ensure proper share of fresh milk to all customers
ensure delivery of milk to customers in good time
improve the quality of the milk
ensure that the milk is presented for a longer period
Correct answer is D
No explanation has been provided for this answer.
Which of these is a vector of malaria fever?
Female anopheles mosquito
Male anopheles mosquito
Female culex mosquito
Male culex mosquito
Correct answer is A
No explanation has been provided for this answer.
Which of these is not correct about the tse-tsefly and mosquito? They
harbour protozoa as disease agents
possess piercing and sucking mouth parts
have intermediate hosts
inject disease- causing organisms into the blood stream
Correct answer is C
No explanation has been provided for this answer.
Which of the following structures in a housefly aids in the transmission of diseases in man?
Hairs
Spiracles
Antennae
Wings
Correct answer is A
No explanation has been provided for this answer.