Q2652. Which of the following is against the rules of ICBN?
Year: 2019
✅ Correct Answer: Generic and specific names should start with small letters
🧠 Solution:
According to ICBN rules, the genus name starts with a capital letter and the specific epithet with a lowercase letter.
Q2651. Select the correctly written scientific name of Mango which was first described by Carolus Linnaeus.
Year: 2019
✅ Correct Answer: Mangifera indica Linn
🧠 Solution:
The correct scientific name of mango as described by Linnaeus is Mangifera indica Linn. The genus starts with a capital letter, species with a lowercase, and the author’s name in Roman script.
Q2638. The contrasting characteristics generally in a pair used for identification of animals in a taxonomic key are referred to as:
Year: 2019
✅ Correct Answer: Couplet
🧠 Solution:
Couplet is the contrasting characteristic generally in a pair used for identification of animals in a taxonomic key. Each half of a couplet is called a lead.
Q2639. Match the items given in Column I with those in Column II and select the correct option:
Year: 2018
✅ Correct Answer: Herbarium – Dried plants, Key – Booklet of characters, Museum – Place of preserved animals, Catalogue – List of species
🧠 Solution:
Herbarium stores dried and pressed plant specimens. Key is a booklet of characters. Museum stores preserved animals/plants. Catalogue is a species list.
Q2653. Nomenclature is governed by certain universal rules. Which one of the following is contrary to the rules of nomenclature?
Year: 2016
✅ Correct Answer: Biological names can be written in any language
🧠 Solution:
Biological names originate from Latin and are italicised in print. They cannot be written in any language.
Q2641. Which statements are correct? I. Biological species definition by Ernst Mayr II. Photoperiod does not affect reproduction III. Binomial nomenclature by Whittaker IV. In unicellular organisms reproduction is growth
Year: 2016
✅ Correct Answer: I and IV
🧠 Solution:
Correct statements are I (Ernst Mayr gave definition) and IV (in unicellular organisms growth = reproduction).
Q2640. The label of a herbarium sheet does NOT carry information on:
Year: 2016
✅ Correct Answer: Height of the plant
🧠 Solution:
Herbarium label includes date, collector, and local names but not the height of the plant.
Q2644. Which one is an example of negative feedback loop in humans?
Year: 2007
✅ Correct Answer: Constriction of skin blood vessels and shivering in cold
🧠 Solution:
Constriction of blood vessels and shivering is a negative feedback response to cold.
Q2643. Living organisms can be distinguished from non-living things on the basis of their ability for:
Year: 2007
✅ Correct Answer: Interaction with environment & progressive evolution
🧠 Solution:
Living organisms uniquely interact with environment and evolve progressively.
Q2642. Biological organisation starts with:
Year: 2007
✅ Correct Answer: Sub-microscopic molecular level
🧠 Solution:
Biological organisation starts at the molecular level with carbohydrates, lipids, proteins and nucleic acids.
Q2646. More than 70% of world’s fresh water is contained in:
Year: 2005
✅ Correct Answer: Polar ice
🧠 Solution:
Most of Earth’s freshwater is locked in polar ice caps and glaciers.
Q2645. Carbohydrates, the most abundant biomolecules on earth, are produced by:
Year: 2005
✅ Correct Answer: Some bacteria, algae and green plant cells
🧠 Solution:
Carbohydrates are produced by algae, green plants and some bacteria via photosynthesis.
Q2647. There is no life on the moon due to absence of:
Year: 2002
✅ Correct Answer: Water
🧠 Solution:
Water is essential for life; absence of water prevents life on the moon.
Q2648. The most important feature of all living systems is to:
Year: 2000
✅ Correct Answer: Replicate the genetic information
🧠 Solution:
Replication of genetic material (DNA) ensures continuity of life. It occurs in all living systems.
Q2649. Homeostasis is:
Year: 1991
✅ Correct Answer: Tendency to resist change
🧠 Solution:
Homeostasis is the tendency of an organism to maintain a stable internal environment through regulatory mechanisms.
Q2650. Employment of hereditary principles in the improvement of human race is:
Year: 1990
✅ Correct Answer: Eugenics
🧠 Solution:
Eugenics refers to the improvement of the human race by applying hereditary principles or modifying fertility.