Which of the following defines symbiosis?
parasites feed on dead organisms
both organisms benefit mutually by living together
Saprophytes feed on living organisms
organisms serve as host to parasite
Correct answer is B
No explanation has been provided for this answer.
Hook and suckers for strong attachment
Along neck for forming young proglottis
The absence of segmentation and appendages
Possession of flame cells for excretion
Correct answer is A
No explanation has been provided for this answer.
At optimum population level, a country has its
Maximum population
Ageing population
Highest birth rate
Highest output per heade
Lowest death rate
Correct answer is D
No explanation has been provided for this answer.
great
small
reversible
zero
Correct answer is D
No explanation has been provided for this answer.
An importance of food web is that living organisms
use web to collect food
can live on their own
have to form a web
depend on one another for their existence
Correct answer is D
No explanation has been provided for this answer.