Animal and Plant Responses Crossword

Any of a group of plant growth hormones that promote growth by cell enlargement, the maintenance of apical dominance and the initiation of root formation in cuttings.
The mechanism that produces regular periodic changes in behaviour or physiology.
A roughly periodic change in the behaviour or physiology of an organism that is generated and maintained by a biological clock.
The directional movement of an animal in response to chemicals in the environment
Behaviour or physiology of animals or plants which approximates the cycle of a lunar month.
Behaviour or physiology of animals or plants which approximates the cycle the tides.
Animals that are most active at dawn and dusk.
Describing a substance, stimulus, organ etc. that originates from within an organism
The resetting of the biological clock on a regular basis, forcing it to take up the period of the environmental cycle.
A colourless hydrocarbon gas, C¬2H4, that occurs naturally in many plants and acts as a growth substance. It is often used to ripen fruit commercially.
The directional movement of an animal in response to gravity
The ability of an organism to find its way back to a specific area
The directional growth of plant organs in response to water in the environment
The directional movement of a cell or organism in response to a stimulus in which rate of movement depends on the intensity
The seasonal movement of complete populations of animals to a more favourable environment
A plant growth response away from a stimulus
Animals that are active at night
The directional growth of plant organs in response to light
Directional movements of animals in response to external stimuli.
Directional plant growth responses in response to external stimuli.
The environmental agent that resets the biological clock.