BIOLOGY NCEA-LEVEL 3 WITH
CORRECT SOLUTIONS
Allelopathy - ANSWER-Chemical inhibition of one species by another. Basically the
same as antibiosis, except that the definition emphasises the chemical connection.
Ambivalence - ANSWER-When a gesture contains elements of dominance and
submission.
Antibiosis - ANSWER-An interspecific relationship where one organism is harmed, but
the other is unaffected.
Auxin - ANSWER-A plant hormone that lengthens cells.
Mimicry - ANSWER-A harmless animal looks like a poisonous one.
Biological clocks - ANSWER-Internal timing systems that continue without external
clues, and control (to some extent) the timing of activities of plants and animals.
Circa - ANSWER-Circa is used to describe endogenous rhythms that either fall short of
or exceed the geophysical cycle.
Circadian - ANSWER-A rhythm of about 24 hours.
Circatidal - ANSWER-A rhythm of about 12.5 hours.
Circalunar - ANSWER-A rhythm of about 1 month.
Circaannual - ANSWER-A rhythm of about 1 year.
Commensalism - ANSWER-An interspecific relationship where one organism benefits,
but the other is unaffected.
Crepuscular - ANSWER-When an animal is active around sunrise and sunset.
Day Neutral Plant - ANSWER-A plant that flowers independently of the day length or
season
Diurnal - ANSWER-Active during the day.
Gause's competitive exclusion principle - ANSWER-If two species have the same niche
they cannot remain for long in the same habitat. One will lose out and be eliminated (or
at least reduced to a very small population.)
CORRECT SOLUTIONS
Allelopathy - ANSWER-Chemical inhibition of one species by another. Basically the
same as antibiosis, except that the definition emphasises the chemical connection.
Ambivalence - ANSWER-When a gesture contains elements of dominance and
submission.
Antibiosis - ANSWER-An interspecific relationship where one organism is harmed, but
the other is unaffected.
Auxin - ANSWER-A plant hormone that lengthens cells.
Mimicry - ANSWER-A harmless animal looks like a poisonous one.
Biological clocks - ANSWER-Internal timing systems that continue without external
clues, and control (to some extent) the timing of activities of plants and animals.
Circa - ANSWER-Circa is used to describe endogenous rhythms that either fall short of
or exceed the geophysical cycle.
Circadian - ANSWER-A rhythm of about 24 hours.
Circatidal - ANSWER-A rhythm of about 12.5 hours.
Circalunar - ANSWER-A rhythm of about 1 month.
Circaannual - ANSWER-A rhythm of about 1 year.
Commensalism - ANSWER-An interspecific relationship where one organism benefits,
but the other is unaffected.
Crepuscular - ANSWER-When an animal is active around sunrise and sunset.
Day Neutral Plant - ANSWER-A plant that flowers independently of the day length or
season
Diurnal - ANSWER-Active during the day.
Gause's competitive exclusion principle - ANSWER-If two species have the same niche
they cannot remain for long in the same habitat. One will lose out and be eliminated (or
at least reduced to a very small population.)
