The main ecological problem facing intertidal organisms is
desiccation
floatation
salinity
humidity
Correct answer is A
Desiccation refers to the drying out of a living organism, such as when aquatic animals are taken out of water. The intertidal zones lay exposed twice daily due to tidal movements.
In a typical freshwater habitat, the edge of the stream or pond constitutes the
tidal zone
intertidal zone
littoral zone
euphotic zone
Correct answer is C
No explanation has been provided for this answer.
Which of the following associations is an example of mutualism
hydra viridis and zoochlorellae
human and lice
shark and remora fish
bread and rhizopus stolonifer
Correct answer is A
Mutualism describes a type of mutually beneficial relationship between organisms of different species. It is a symbiotic relationship in which two different species interact with and in some cases, totally rely on one another for survival. Zoochlorellae often colour their hosts green while the feeding of the hydra aids in the growth of the algae.
The major consequence of bush burning in an ecosystem is
the loss of water
the loss of biological diversity
a decrease in animal population
an increase in soil fertility
Correct answer is B
No explanation has been provided for this answer.
The transmission of impulses along a nerve fibre is characterized by
hormonal and temperature changes
electrical and ionic changes
hormonal changes
electrostatic changes
Correct answer is B
No explanation has been provided for this answer.