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Do planaria exhibit a positive or negative phototaxis to light?
negative
What is phototaxis?
It is the movement of organism or cell in response to light whether in the direction of light( positive phototaxis) or in the opposite direction ( negative phototaxis). the positive phototaxis is usually occurs in roots of plants whereas the negative photataxis occurs in remaining or outer part of plant in order to get light for photosynthesis.
A bacterial cell moving toward light would be an example of?
positive phototaxis.
An oriented movement in response to light or chemical stimuli?
Movement in response to light is called phototaxis, and in response to chemicals is chemotaxis. More specifically, movement towards a stimulus is positive and away from is negative. For example, positive chemotaxis is movement of a cell towards nutrients.
Dugesia will display phototaxis?
Dugesia will exibit negative phototaxis. Look it up in a zoology book. here is an article as well. http://www.helium.com/items/1079086-the-observation-of-dugesia-in-response-to-light-and-gravity
Which insects use phototaxis?
Insects that use phototaxis are moths and cockroaches. Phototaxis means that these insects are attracted to light and will move towards it.
Are ants harmful in your flower pots?
They can. Some ants engage in symbiotic relationships with some plants on occasion. For the common ant and your average garden flower, ants should not have a positive or negative effect.
Is a positive plus a negative make a positive or a negative?
Positive + Negative = Negative Negative + Negative = Positive Positive + Positive = Positive Negative + Positive = Negative
What is a negative - positive?
Negative * positive = negative Positive * positive = positive Negative * negative = positive
How is dividing integers similar to multiplying integers with the resulting sign?
The rules for the sign (positive or negative) of the result of a multiplication is the same as division. For multiplication: Positive * Positive --> Positive Positive * Negative --> Negative Negative * Positive --> Negative Negative * Negative --> Positive For division: Positive / Positive --> Positive Positive / Negative --> Negative Negative / Positive --> Negative Negative / Negative --> Positive
If a negative is divided by a positive is it negative?
Yes. Negative/negative = positive Postive/Positive = positive Negative/Positive - negative
When multiplying numbers what do you do with the positive and negative signs?
Negative * positive = negative Positive * positive = positive Negative * negative = positive
