In relation to (IAA) in plant growth, which statement best describes its mechanism in promoting cell elongation in shoot

Lowers pH to loosen cell walls.

Which of the following best defines tropism in the context of plant biology?

A plant’s growth response toward or away from a specific stimulus.

Which option most accurately demonstrates positive gravitropism?

Roots growing downward in soil.

In a choice chamber experiment on woodlice, which setup best controls for external variables?

Use adjacent humid and dry chambers with equal light and temperature.

Which of the following scenarios best illustrates an example of kinesis rather than taxis

Woodlice increasing rate of movement in dry area until it finds humidity

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Taxis and Kinesis + Tropisms

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Questions 7

Answers

1
What is the response called when an organisms' movement is affected by a non-directional stimulus?
Tropism
Kinesis
Reflex Action
Migration
2
What is the response called when an organism moves towards or away from a directional stimulus?
Taxis
Kinesis
Muscle contraction
Phototropism
3
In relation to (IAA) in plant growth, which statement best describes its mechanism in promoting cell elongation in shoot
Lowers pH to loosen cell walls.
Thickens cell walls for support.
Stimulates cell division with gibberellins.
Releases calcium to expand cell walls.
4
Which of the following best defines tropism in the context of plant biology?
An adaptation in plants in response to repeated exposure to stimuli.
A temporary, reversible change in a plant’s structure in response to light.
A random, non-directional movement in response to a stimulus
A plant’s growth response toward or away from a specific stimulus.
5
Which option most accurately demonstrates positive gravitropism?
Tendrils wrapping around a support.
Shoots bending upwards.
Roots growing downward in soil.
Leaves orienting toward light.
6
In a choice chamber experiment on woodlice, which setup best controls for external variables?
Include two chambers with identical humidity but different light levels.
Use adjacent humid and dry chambers with equal light and temperature.
Place all chambers in direct sunlight to observe movement.
Place woodlice in a single dry chamber with no other sections.
7
Which of the following scenarios best illustrates an example of kinesis rather than taxis
A salmon swimming upstream toward the source of a river to spawn.
Woodlice increasing rate of movement in dry area until it finds humidity
A moth flying directly toward a light source in a dark room.
A flatworm moving away from a bright light source in a pond.

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