Science Group
Explore subjects and practice MCQs
10
Chapters
1,000
Total MCQs
Unit-2 Biodiversity
Answer: Biodiversity covers the variety of genes, species and ecosystems present in a region or on the whole Earth.
Answer: Genetic diversity is the variety of genes and alleles within a species, which helps populations adapt to changing environments.
Answer: Species is the basic unit of classification; closely related species are grouped into a genus.
Answer: Species diversity measures the number and variety of different species living in an ecosystem.
Answer: Carolus Linnaeus (1707-1778) introduced binomial nomenclature and is called the father of taxonomy.
Answer: In a scientific name, the first word is the genus name, written with a capital first letter.
Answer: The second word of a scientific name is the specific epithet, which identifies the species within the genus.
Answer: Panthera leo is the scientific name of the lion; the tiger is Panthera tigris.
Answer: According to the rules of binomial nomenclature, the genus starts with a capital letter and the species with a small letter.
Answer: In printed text scientific names are written in italics; when written by hand they are underlined.
Answer: The three domains are Archaea, Bacteria and Eukarya, which include all cellular life forms.
Answer: Thermophiles are archaebacteria that thrive in extremely hot environments such as hot springs.
Answer: The six kingdoms are Archaebacteria, Eubacteria, Protista, Fungi, Plantae and Animalia; Monera belongs to the older five-kingdom system.
Answer: Prokaryotes lack a membrane-bound nucleus, while eukaryotes have a true nucleus.
Answer: Plant cell walls are made of cellulose, which provides structural support.
Answer: Mushrooms, moulds and yeasts are placed in kingdom Fungi.
Answer: Fungi are saprophytic organisms that absorb nutrients from dead organic matter.
Answer: All green plants are placed in kingdom Plantae because they photosynthesize and have cellulose cell walls.
Answer: Fungal cell walls are made of chitin, not cellulose.
Answer: Taxonomic ranks are arranged from the most inclusive (Domain) to the least inclusive (Species).