Free NEET General Questions and Answers — Questions and Answers
Question 1: The basis of biological organization is
- Cellular level
- Organismic level
- Submicroscopic molecular level (Correct answer)
- Atomic level
Correct answer: Submicroscopic molecular level
The basis of biological organization begins at the most fundamental level, which is the submicroscopic molecular level. This includes atoms, which combine to form complex molecules like DNA, proteins, and lipids. These molecules then assemble into organelles, which in turn form cells, the basic unit of life, leading to higher levels of organization.
Question 2: ICBN is an acronym for:
- International Congress of Biological Names
- International Code for Botanical Nomenclature (Correct answer)
- Indian Congress of Biological Names
Correct answer: International Code for Botanical Nomenclature
ICBN stands for the International Code for Botanical Nomenclature. It is a globally recognized set of rules and recommendations that govern the formal scientific naming of plants, fungi, and certain other groups of organisms. Its primary purpose is to ensure stability and avoid ambiguity in botanical names worldwide.
Question 3: An organism's evolutionary history is known as:
- Ontogeny
- Paleontology
- Ancestry
- Phylogeny (Correct answer)
Correct answer: Phylogeny
Phylogeny refers to the evolutionary history and relationships among groups of organisms, tracing their lineage and diversification over geological time. It helps in understanding how different species are related to each other through common ancestors. Ontogeny describes the development of an individual organism, while paleontology is the study of fossils.
Question 4: Which of the following is not a true statement?
- Key is a taxonomic aid for identification of specimens
- A museum has collection of photographs of plants and animals (Correct answer)
- Botanical gardens have collection of living plants for reference
- Herbarium houses dried, pressed and preserved plant specimens
Correct answer: A museum has collection of photographs of plants and animals
Museums primarily house collections of preserved physical specimens of plants and animals, including skeletons, fossils, and artifacts, for scientific study and public display. While photographs may be used in exhibits, the core collection consists of tangible biological specimens, not just images. The other statements accurately describe the functions of taxonomic keys, botanical gardens, and herbaria.
Question 5: If two plants meet the following criteria, it is certain that they are of the same species:
- have same number of chromosomes
- look similar and possess identical secondary metabolites
- have more than 90 percent similar genes
- can reproduce freely with each other and form viable seeds (Correct answer)
Correct answer: can reproduce freely with each other and form viable seeds
The biological species concept defines a species as a group of organisms that can naturally interbreed and produce fertile, viable offspring. If two plants can freely reproduce with each other and form viable seeds, it is a definitive indication that they belong to the same species, as they share a common gene pool and reproductive compatibility.
Question 6: Which of the following traits are shared by filamentous algae, mosses, and multicellular fungi?
- Multiplication by fragmentation (Correct answer)
- Mode of nutrition
- Members of kingdom-Plantae
- Diplontic life cycle
Correct answer: Multiplication by fragmentation
Fragmentation is a common asexual reproductive strategy observed in various organisms. Filamentous algae (like Spirogyra), mosses (through fragmentation of their gametophytes), and multicellular fungi (via hyphal fragmentation) all utilize this method. It involves the breaking of an organism into several pieces, each capable of developing into a new, independent individual.
Free NEET General Questions and Answers
The basis of biological organization is