Biology Coordination and Control, Biology Coordination and Control MCQs
The processes of biology coordination and control allow organisms to react to internal and external stimuli through survival mechanisms to adapt successfully. Organisms use their nervous system and endocrine system for control functions in animals alongside hormonal regulation for growth and response mechanisms in plants. Nerve cells in the nervous system use electrical impulses for fast responses but the endocrine system produces hormones for sustained control functions. In plants, chemical messengers like auxins, gibberellins, and abscisic acid control various physiological activities.
ECAT students must understand biology coordination and control at a master level to grasp homeostasis and understand movement and response mechanisms. The following section includes essential concepts alongside different control systems followed by multiple-choice questions for assessment purposes.
What is Biology Coordination and Control?
1. Coordination in Animals
- Nervous System – Consists of the central nervous system (CNS) and peripheral nervous system (PNS) for fast responses.
- Endocrine System – Produces hormones that regulate metabolism, growth, and reproduction.
- Reflex Actions – Quick, automatic responses to stimuli for protection.
2. Coordination in Plants
- Hormonal Control – Regulated by auxins, gibberellins, cytokinins, ethene, and abscisic acid.
- Tropic Movements – Phototropism, gravitropism, and thigmotropism help plants grow toward essential resources.
- Nastic Movements – Immediate, non-directional responses to stimuli (e.g., closing of Mimosa leaves).
3. Homeostasis and Control Mechanisms
- Negative Feedback Mechanisms – Maintain body temperature, blood glucose levels, and water balance.
- Hormonal Balance – Regulated by thyroid, pancreas, and adrenal glands.
- Circadian Rhythms – Biological clocks controlling sleep cycles and seasonal behaviors.
Biology Coordination and Control Quiz – Test Your Knowledge
1. All the activities of plants from growth to fruit production and ripening are under the control of plants ?
- Minerals
- Hormonescorrect
- Vitamins
- Movements
2. The only naturally occurring auxin is ?
- Naphthalene acetic acid
- 2,4-D
- Indole acetic acidcorrect
- Indole propionic acid
3. Which of the following hormone is used to break the dormancy of seed ?
- Auxin
- Abscisic
- Gibberellin
- Cytokinincorrect
4. The outgrowth on the plants induced by parasites are ?
- Calluses
- Gallscorrect
- Meristem
- Parenchyma
5. The coordination makes possible the integration of unctions essential to organismic ?
- Learning
- Survivalcorrect
- Attitude
- Behaviour
6. Gibberellins are produced commercially from ?
- Bacterial cultures
- Algal cultures
- Fungal culturescorrect
- Microbial cultures
Question was not answered7. If the biorhythms are less than or about 365 days these rhythms in activity are called ?
- Circadian
- Diurnal rhythms
- Circannualcorrect
- All of these
8. Auxins promote gorwth of roots from ?
- Cuttings
- Both a and ccorrect
- Calluses
- Galls
9. The hormone antagonistic to gibberrellins is ?
- Cytokinin
- Ethene
- Abscisic acidcorrect
- Auxin
10. The hormone which induces flowering in pineapple is ?
- Gibberellin
- Abscisic acid
- Ethenecorrect
- Auxins
11. Biorhythms may occur showing periodicity of about 24 hours they are called as ?
- Circannual
- Both a ans ccorrect
- Circadian
- Diurnal rhythms
12. The hormone which delays senescence in cabbage and lettuce is ?
- Cytokinincorrect
- Auxin
- Abscisic acid
- Gibberellin
13. Many plants take a yellowish hue when they fail to form sufficient chlorophyll. This condition is called ?
- Necrosis
- Chlorosiscorrect
- Apoptosis
- All of these
14. The etiolated plants are without ?
- Chlorophyllscorrect
- Xanthophylls
- Plastids
- Chloroplasts
15. The plant hormone which promote bolting of some rosette plants is ?
- Auxin
- Cytokinin
- Abscisic acid
- Gibberellincorrect
16. Abscisic acid promotes closing of stomata under condition ?
- Wind stress
- Water stresscorrect
- Light stress
- Temperature stress
17. Abscisic acid inhibitsstem growth notably during physiological stress ?
- Strong winds
- Water logging
- Both a and bcorrect
- Drought
18. Chlorosis usually arises from short supplies of ?
- Salts
- Hormones
- Vitamins
- Mineralscorrect
19. 2,4-D kills broad leaved ?
- Mono cots
- Angiosperms
- Gymnosperms
- Di cotscorrect
20. Which of the following is not related with ethene ?
- Promote bud dormancycorrect
- Ripening of citrus fruit
- Flow of latex from rubber plant
- Ripening of tomatoes
21. The poorly differentiated mass of amorphous cell is called ?
- Parenchyma
- Calluscorrect
- Gall
- Meristem
22. In living things the behavioral activities occur at regular intervals which are called ?
- Biorhythms
- Diurnal rhythms
- Both a and ccorrect
- Biological rhythms
23. NAA is ?
- Abscisic acid
- Cytokinin
- Auxincorrect
- Gibberellin
24. Absicsic acid can be sprayed on tree crops to regulate ?
- Leaf drop
- Fruit dropcorrect
- All of these
- Seed drop
25. Which of the following is used in brewing industry to stimulate a amylase production in barley and also promotes malting ?
- GA3correct
- GA
- GA2
- GA1
Conclusion
Understanding biology coordination and control is crucial for ECAT students aiming to excel in entry tests. The methods control nervous system activity as well as maintain hormone levels and direct plant development. The practice of MCQs related to biology coordination and control enables students to develop better examination readiness and problem-solving abilities.
Nokryan.com provides additional MCQs together with study resources and ECAT entry test preparation for today’s learners.