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.
A researcher observes an isolated system containing complex organic molecules undergoing spontaneous self-assembly into membrane-bound structures. These structures exhibit rudimentary metabolism but no reproduction or heritability. Which characteristic of life is the MOST significant barrier preventing these structures from being classified as living organisms?
Metabolism
Cellular organization
Reproduction and growth
Adaptation
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
Which process is essential for the continuity of life?
Nutrition
Respiration
Reproduction
Excretion
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
What is illustrated by the statement โNothing lives forever, yet life continuesโ?
Metabolism
Embryogenesis
Reproduction
Replication
In majority of higher animals and plants reproduction and growth are
Mutually exclusive events
Simultaneous events
Dependent events
Identical events
Which of the following set of organisms reproduce by fragmentation (asexual mode of reproduction)?
Amoeba, fungi and earthworm
Fungi, filamentous algae and protonema of mosses
Hydra, fungi, Amoeba and bacteria
Earthworm, bacteria and fungi
Which of the following are considered as the twin characteristics of growth?
I. Responses to stimuli
II. Increases in mass
III. Increases in the number of individuals
IV. Increases in width
I and II
II and IV
I and III
III and IV