11. What is the scientific name of sea fan?
[A] Psittaciformes
[B] Pavo cristatus
[C] Alcyonacea
[D] Corvus
Show Answer
Correct Answer: C [Alcyonacea]
Notes:
The scientific name of sea fan is Alcyonacea. Alcyonacea are an order of corals that do not produce calcium carbonate skeltons. They are found throughout the oceans of the world.
12. Who was awarded the Nobel Prize in Medicine for the discovery of Human Immunodeficiency Virus?
[A] Françoise Barré-Sinoussi
[B] Luc Montagnier
[C] Both 1 & 2
[D] None of these
Show Answer
Correct Answer: C [Both 1 & 2]
Notes:
Françoise Barré-Sinoussi and Luc Montagnier were awarded the Nobel Prize in Medicine for the discovery of Human Immunodeficiency Virus in 2008.
13. Which is the largest phylum of Animalia?
[A] Arthropoda
[B] Annelida
[C] Moluska
[D] Aves
Show Answer
Correct Answer: A [Arthropoda]
Notes:
Arthropoda is the largest phylum of animals. In Arthropoda we study in detail about insects.
14. What is a common feature of archaebacteria?
[A] Structure of cell membrane
[B] Structure of cell wall
[C] Has fatty acid synthetase
[D] Structure of flagellin protein
Show Answer
Correct Answer: C [Has fatty acid synthetase]
Notes:
Archaebacteria are primitive bacteria that have a cell wall consisting of branched lipids that help them to endure adverse conditions.
15. Which of the following are non-motile, highly thickened asexual spores called?
[A] Hypnospores
[B] Aplanospores
[C] Macrozoospores
[D] Microzoospores
Show Answer
Correct Answer: A [Hypnospores]
Notes:
Hypnospores are thick-walled structures that form under unfavorable conditions. Under prolonged unfavorable conditions, the protoplasm of hypnospores divides to form cysts. Cysts are capable of forming new thallus.
16. Which of the following includes ‘club fungus’ in this fungal division?
[A] Zygomycota
[B] Deuteromycota
[C] Basidiomycota
[D] Ascomycota
Show Answer
Correct Answer: C [Basidiomycota]
Notes:
Basidiomycota is one of the two larger divisions. Together with the Ascomycota, they constitute the subfamily Dicarya within the kingdom Fungi.
17. Which of the following is the proof of the aquatic origin of bryophytes?
[A] Ciliated sperms
[B] Green colour
[C] Protonema thread
[D] Some are still aquatic
Show Answer
Correct Answer: A [Ciliated sperms]
Notes:
Ciliated sperms are proof of the aquatic origin of bryophytes.
18. What is a saprophytic bryophyte?
[A] Buxbaumia aphylla
[B] Ricciocarpus natans
[C] Riccia fluitans
[D] Radula sp
Show Answer
Correct Answer: A [Buxbaumia aphylla]
Notes:
Buxbaumia aphylla is a saprophytic bryophyte and does not produce abundant chlorophyll.
19. In which of the following hormones is stimulation growth factor found?
[A] Gibberellins
[B] Cytokinins
[C] Auxins
[D] Abscisic Acid
Show Answer
Correct Answer: B [Cytokinins]
Notes:
The stimulating growth factor was found to be cytokinin, a hormone that promotes cell division.
20. In which of the growing tissues are cytokinins most abundant?
[A] roots
[B] embryos
[C] fruits
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Cytokinins are most abundant in growing tissues – such as roots, embryos and fruits, where cell division is taking place.
