Human Sperm
The stimuli caused the bird to fly away.
Yes many plant hormones are secreted by plants internally. Such as auxin, gibbrailin, cytokinin etc.
Plant growth hormones e.g. IAA.
tropism
plant and animals
Plant growth hormones e.g. IAA.
No, different parts of a plant may respond differently to stimuli. For example, the roots may respond to water availability by elongating or branching, while the leaves may respond to light by adjusting their orientation or size. Each part of the plant has specific adaptations to respond to different stimuli in its environment.
Many plant diseases are caused by fungi through their spores. For example white rust of crucifers is caused by Albugo candida. Its mode of transmission is by wind born conidiospores.Many plant diseases are caused by fungi though their spores. For example white rust of crucifers is caused by Albugo candida.Its mode of transmission is by wind borne conidiospores.
Yes. ALL living things, whether plant/animal/protist/fungus/bacteria/archea respond to stimuli.
Negative feedback is the response to changes in stimuli that reverts the change back to the normal stimuli.
Hormones.
Emotions come from the brain to different parts. They are caused by the external stimuli.