commensalism
predation
parasitism
mutualism
Correct answer is C
A parasite is an organism that lives on or in a host organism and gets its food at the expense of its host.
Xerophytes have the following characteristics aimed at conserving water except
thick cuticle
broad leaf surfaces
sunken stomata
waxy cuticle
Correct answer is B
The xerophytes have reduced leaf size in order to reduce the surface area, thereby reducing the water loss in the plant.
In an ecosystem, the least efficient energy transfer link is from the
secondary consumers to decomposers
sun to producers
primary consumers to secondary consumers
producer to primary consumers
Correct answer is A
From the food chain, the energy flows from the producers to the primary consumer to the secondary consumers and about 90% of the energy is lost in the process of this transfer. Hence, the energy level by the time it gets to the secondary consumers. There is less energy transferred to the decomposers.
Which of the following instruments is used to determine the turbidity of water?
hygrometer
hydrometer
secchi disc
rain gauge
Correct answer is C
The secchi disc is used to check for the transparency and the turbidity of water.
light energy
low humidity
oxygen
nitrate
Correct answer is A
Proper light in the aquarium serves as a form of energy for the photosynthetic plants and animals, hence it is very important.