Which of the following parts of the tooth is first damaged during dental decay?
Cement
Enamel
Dentine
Root
Gum
Correct answer is B
No explanation has been provided for this answer.
The essential parts of a flower are
petals and sepals
anther and filament
stigma and style
androecium and gynoecium
petals and gynoecium
Correct answer is D
No explanation has been provided for this answer.
Platyhelminthes
coelenlerata
annelida
nematoda
arthropoda
Correct answer is A
No explanation has been provided for this answer.
The association between protozoa and termites is an example of
symbiosis
parasitism
predation
saprophytism
epiphytism
Correct answer is A
No explanation has been provided for this answer.
The reduction of nitrates to gaseous nitrogen is
nitrogen fixing
nitrogen cycle
ammonification
putrefaction
denitrification
Correct answer is E
No explanation has been provided for this answer.