1. ANSWER THE QUESTIONS:
1) Use the example of gravity to explain how a tropism can be positive or
negative. Draw a picture.
2) What is the difference between tropisms and nastic movements? Give an
example.
3) Some organisms have the ability to sense a magnetic field and coordinate
movements in response, orienting toward the Earth´s poles. Is this a taxism, a
kinesis, a tropism or a nastic movement? Which organisms must have this
ability?Why?
4) Thigmotropism is a movement in which a plant grows in response to touch
or contact stimuli. In what type of plant do you expect to show a positive
thigmotropism?
5)Why are we able to sense stimuli?
6)What is the difference between taxisms and kinesis? Give an example.
7) Dondiego de la noche is a plant that opens it petals at night. It is an example
of what?Why do you think that happens?
8) Can a bacteria respond to sitimuli? Explain.