Cellular Reaction to Its Environments - SS1 Biology Past Questions and Answers - page 1
What type of response is characterized by growth or movement in response to an external stimulus?
Tactic response
Nastic response
Tropic response
Which of the following is an example of a nastic response in plants
Thigmotropism
Nyctinasty
Geotropism
Which term describes the movement of an organism towards or away from a specific directional stimulus?
Tactic response
Nastic response
Tropic response
In plants, which type of response occurs due to changes in turgor (water) pressure in cells?
Tactic response
Nastic response
Turgor response
How do tropic responses in plants differ from nastic responses?
Tropic responses are reversible, while nastic responses are irreversible
Tropic responses are growth-related, while nastic responses are movement-related.
Tropic responses occur in animals, while nastic responses occur in plants
Tropic responses are growth-related, while nastic responses are movement-related.
Which of the following statements correctly describes the structure and function of cilia and flagella in cells?
Cilia and flagella are both short, hair-like structures involved in cell movement.
Cilia are found in prokaryotic cells, while flagella are found in eukaryotic cells.
Cilia are responsible for moving fluids over the cell's surface, while flagella are involved in cell division
Cilia and flagella are both short, hair-like structures involved in cell movement.
Which of the following organelles possesses a characteristic whip-like structure and is responsible for cell movement?
Ribosome
Flagellum
Mitochondria
Which of the following is a characteristic of sexual reproduction in organisms?
It involves the fusion of gametes from two parents.
It produces genetically identical offspring.
It occurs through binary fission
Which of the following is a method of asexual reproduction commonly observed in plants?
Budding
Meiosis
Pollination
Summarize in one paragraph the difference between nastic, tactic and tropic responses
Nastic, tactic, and tropic responses are different types of responses exhibited by organisms in relation to stimuli.
Nastic responses refer to non-directional and often rapid movements in response to external stimuli, such as changes in temperature or humidity. These movements are not dependent on the direction of the stimulus but are rather triggered by the intensity of the stimulus.
Tactic responses, on the other hand, involve directional movements in response to stimuli. Organisms may move towards or away from a stimulus, such as light or chemicals, depending on their specific sensitivities.
Tropic responses are directional growth or movement responses exhibited by organisms in relation to a stimulus. These responses can be positive, where the organism moves towards the stimulus, or negative, where the organism moves away from the stimulus.
Tropic responses are typically slower compared to nastic or tactic responses and are often observed in plants, such as the growth of roots towards gravity (positive gravitropism) or the bending of plants towards light (positive phototropism).