Prepare for NEET Biology Diversity in Living World (What Is Living) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert insights to define life and its basic characteristics.
NEET Questions / Botany / Diversity in Living World / What Is Living
A scientist discovers a novel entity exhibiting complex organic molecules, compartmentalization, and energy transformation. However, it lacks a definitive cellular structure and doesn't demonstrate heritability. Which characteristic of life is MOST definitively absent in this entity?
Metabolism
Reproduction and growth
Adaptation
Response to stimuli
Prions, infectious protein particles, can induce conformational changes in normal proteins, leading to diseases like Creutzfeldt-Jakob disease. While exhibiting self-propagation, prions lack genetic material. Do prions challenge the conventional definition of living organisms, and why?
No, because they are composed of organic molecules.
Yes, because they lack heritable genetic material yet exhibit a form of 'reproduction'.
No, because they interact with living organisms.
Yes, because they cause disease.
Viruses exhibit characteristics of both living and non-living entities. Which of the following properties of viruses MOST strongly supports the argument AGAINST their classification as living organisms?
Presence of genetic material (DNA or RNA)
Ability to evolve and adapt to their environment
Inability to reproduce independently outside a host cell
Specific interaction with host cells
Imagine a synthetic life form created in a lab that uses a novel information storage molecule distinct from DNA or RNA, but still exhibits heritability and undergoes evolution. Which of the following aspects of the current definition of life would MOST require reconsideration in light of this discovery?
The requirement for cellular structure
The dependence on carbon-based chemistry
The specific molecular basis of heredity
The ability to respond to environmental stimuli
All living organisms show:
Consciousness
Locomotion
Response to stimuli
Photosynthesis
A defining feature of living organisms is their ability to respond to stimuli. Which of these is an example of a plant responding to a stimulus?
A rock rolling down a hill
Water evaporating from a puddle
Phototropism in a sunflower
Salt dissolving in water
Which of the following processes demonstrates adaptation in living organisms?
A stone weathering over time
Formation of rust on iron
Development of camouflage in a chameleon
Sugar dissolving in water
Consciousness is regarded as a defining property of living organisms. Which example best demonstrates consciousness in animals?
A river flowing downstream
Clouds forming in the sky
A dog responding to its owner's call
Crystals forming in a saturated solution
All living organisms maintain a constant internal environment despite external changes. This process is known as:
Metabolism
Adaptation
Homeostasis
Reproduction
Among the following choose the properties shown by the living organism exclusively?
I. growth
II. increase in mass
III. self-replication ability
IV. response to touch stimuli
I and II
II and IV
I and III
III and IV
