Prepare for NEET Biology Diversity in Living World with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert notes to master classification and taxonomy.
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
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
While classifying organisms, which of the following presents the biggest challenge to a strictly phylogenetic system of classification?
Convergent evolution
Horizontal gene transfer
Fossil record incompleteness
Morphological similarities in unrelated species
Which of the following is not a valid reason why the morphological species concept can be problematic?
It can be difficult to distinguish between intraspecific variation and interspecific differences.
Cryptic species may be morphologically identical but reproductively isolated.
It requires detailed genetic analysis.
Morphological traits can be influenced by environmental factors leading to phenotypic plasticity.
A newly discovered organism exhibits radial symmetry in its larval stage but bilateral symmetry as an adult. Its body cavity is formed by splitting of the mesoderm. It possesses a water vascular system. To which phylum does this organism MOST likely belong?
Echinodermata
Chordata
Cnidaria
Annelida
You discover an unusual marine organism. To determine its taxonomic classification, you consult a key, but it leads to conflicting results with a previously published monograph. Assuming both resources are reliable within their scope, what is the MOST likely explanation for the discrepancy?
The key is outdated and needs revision.
The monograph is too specialized and overlooks common variations.
The organism may represent a newly discovered species or a variant not yet documented in the monograph.
There's a fundamental error in the taxonomic system itself.
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
Select true statement from the following and choose the right answer from the option given below I. Human’s scientific name is Homosapiens II. Systema naturae is written by John Ray III. Highest taxonomic categories is division IV. Taxonomic group of any rank is taxon V. A group of closely related species of organism represent genus VI. The term ‘systematic’ was coined by de Candolle
II, III, IV and VI
I, III, V and VI
I, IV and V
II, III and VI
