Biology Class Test
This test covers the whole syllabus of CBSE Class XII Biology.
Questions
Which of these refers to the mode of cross pollination performed by birds?
- Entomophily
- Ornithophily
- Chiropterophily
- Malacophily
- Anemophily
Which of these is an autoimmune disease?
- AIDS
- Tetanus
- Ring Worm
- Rheumatoid Arthritis
- Amoebic Dysentry
Which of these is a method of ex situ conservation?
- Zoological Park
- National Park
- Wildlife Sanctuary
- Biosphere Reserve
- Sacred Grove
Who proposed the mutation theory of evolution?
- Lamarck
- Charles Darwin
- Hugo de Vries
- August Weismann
- Aristotle
Which of the following improved traits is observed in golden rice?
- Higher protein content
- Enriched vitamin A content
- Insect resistance
- Increased shelf life
- Herbicide resistance
Which of the following phenomena refers to the development of a fully formed individual directly from an unfertilised ovum?
- Spermatogenesis
- Oogenesis
- Parthenogenesis
- Organogenesis
- Gametogenesis
Which of these acts as a start codon for the protein synthesis?
- AUG
- UAG
- UGA
- GUA
- AAG
Which of the following is not a greenhouse gas?
- Carbon dioxide
- Methane
- Water vapour
- Oxygen
- Nitrous oxide
What do we call the process of synthesis of double stranded DNA from single stranded RNA?
- Transcription
- Reverse Transcription
- Translation
- Translocation
- Transformation
Which international convention was held with the objective of conservation of biological diversity?
- Montreal Protocol
- Kyoto Protocol
- Earth Summit
- World Summit
- Beijing Protocol
What is Allen’s rule?
- Birds of colder regions tend to have narrower wings than those of warmer regions.
- Fish found in cold waters tend to have more vertebrae than those found in warm waters.
- Mammals, birds and insects found in tropical regions are darker in colour than those found in arctic regions.
- Mammals and birds of colder regions are larger in size than those of warmer regions.
- Mammals living in cold regions tend to have shorter ears and limbs than those found in warm areas.
What is the study of pollen grains called?
- Anthology
- Pomology
- Palynology
- Paleontology
- Pedology
Which microbe is used to produce statins that are being used as blood cholesterol lowering agents?
- Monascus purpureus
- Trichoderma polysporum
- Byssochalmys fulva
- Streptococcus
- Saccharomyces fragalis
What is spermiation?
- Transformation of spermatids into spermatozoa
- Formation of ova in the Graafian follicles of ovary
- Differentiation of cells at specific locations of the germ layers of gastrula to form the organ rudiments
- Release of sperms from seminiferous tubules
- Release of ova from Graafian follicle
Which trophic level is occupied by herbivores in a typical forest food chain?
- Primary producers
- Primary consumers
- Secondary consumers
- Tertiary consumers
- First trophic level