Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Which of the following would help a few variants of bacteria in a population living in temperate waters to survive and grow further, if the water temperature were to be increased by global warming?
Resistant to heat
Resistant to cold waves
Resistant to water
Resistant to wind pressure
Resistant to heat
Evolutionary adaptation involves the selection of specific genetic variants that possess traits providing a survival advantage in a changing environment. Bacteria that are naturally 'heat resistant' (thermophilic or heat-tolerant) will survive and reproduce more successfully than others as water temperatures rise due to global warming, leading to an increase in their frequency within the population.
Evolutionary adaptation involves the selection of specific genetic variants that possess traits providing a survival advantage in a changing environment. Bacteria that are naturally 'heat resistant' (thermophilic or heat-tolerant) will survive and reproduce more successfully than others as water temperatures rise due to global warming, leading to an increase in their frequency within the population.
Think of it like a group of people at a beach: if the air temperature suddenly shoots up, the people wearing hats and using sunscreen (the 'resistant' ones) will stay comfortable and continue their activities, while those without protection may have to leave, eventually making the group on the beach seem more 'hat-wearing' than before.
Fitness=Environment┬аCapacityReproductive┬аSuccessтАЛ тАФ represents the relative survival advantage of a genotype.
This process is known as 'natural selection'. Genetic variations occur randomly in a population, and when an environmental stressor like increased temperature is introduced, those variants with proteins or cell membranes that maintain stability and functionality under heat stress are selectively favored. Over generations, these survivors replicate, passing on the advantageous genes to their offspring, which causes the entire population's profile to shift toward heat resistance.
Natural selection acts on existing genetic variation.
Heat resistance is a result of structural protein stability at higher temperatures.
Environmental stressors serve as filters for genetic traits.
Populations evolve over generations, not individuals.
Ensures species survival in changing environments.
Leads to the emergence of specialized traits.
Slow process, may not keep pace with rapid anthropogenic climate change.
Reduces overall genetic diversity in the short term.
Predicting the spread of pathogens in climate-stressed regions.
Industrial bio-engineering for heat-tolerant enzyme production.
Bacteria are prokaryotes with simple genetic mechanisms, allowing for rapid mutation and adaptation rates.
Option B (cold waves), C (water), and D (wind pressure) do not relate to the specific physiological challenge posed by a rise in thermal energy (temperature) in a liquid medium.
A is correct тАФ Bacteria that are resistant to heat possess the necessary genetic traits to maintain cellular integrity and metabolic function in warmer water, ensuring their survival and propagation.
Always identify the environmental stressor in the question (in this case, 'increased temperature') and link it to the biological trait that directly mitigates that specific stress (heat resistance).
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download тАв 100K+ Aspirants