11. Which of the following are chlorophyll-bearing, simple, thalloid, autotrophic and largely acquatic(both fresh water and marine) organisms?
[A] Gymnosperms
[B] Bryophytes
[C] Pteridophytes
[D] Algae
Show Answer
Correct Answer: D [Algae]
Notes:
Algae is an informal term for a large, diverse group of photosynthetic eukaryotic organisms that are not necessarily closely related, and is thus polyphyletic.
12. Pollination by which among the following is called as ornithophily?
[A] Rodents
[B] Aquatic animals
[C] Ants
[D] Birds
Show Answer
Correct Answer: D [Birds]
Notes:
Ornithophily refers to the pollination assisted by the birds. Ornithology is a branch of science which studies about birds. Dr. Salim Ali is a famous Indian ornithologist.
13. Which among the following is not a bio-fertilizer?
[A] Vermi compost
[B] Urea
[C] Azobacter
[D] Clostridium
Show Answer
Correct Answer: B [Urea]
Notes:
Biofertilizers are substances that contain microorganisms, which when added to the soil increase its fertility and promote plant growth. Urea is not a biofertilizer.
14. Branch of science dealing with the medicinal plants is known as__?
[A] Pharmacognosy
[B] Pharmacology
[C] Phenology
[D] None of these
Show Answer
Correct Answer: A [Pharmacognosy]
Notes:
Pharmacognosy is the study of drugs or raw drugs produced from natural sources such as plants, microbes, and animals. It involves the analysis of their biological, chemical, biochemical and physical properties.
15. What is the approximate number of specific cells in the human body?
[A] 200 types
[B] 300 types
[C] 250 types
[D] 150 types
Show Answer
Correct Answer: A [200 types]
Notes:
Scientists estimate that the human body contains around 37 trillion cells and 200 different cell types. This includes 50 billion fat cells and 2 billion heart muscle cells. The number of bacterial cells inside a human body is around 38 trillion. This is much closer to the estimated 30 trillion human cells in the body.
Scientists used data reported by others about individual organs and some mathematical modeling to obtain their results.
16. Which of the following is a morphological feature of paramyxovirus?
[A] Fragile viruses often visualised with RNA spewing from the inside
[B] Elongate viruses
[C] Icosahedral viruses with envelope
[D] Very large viruses
Show Answer
Correct Answer: A [Fragile viruses often visualised with RNA spewing from the inside]
Notes:
Paramyxovirus are a family of single-stranded RNA viruses that cause a variety of infections in vertebrates. Many important human diseases are caused by paramyxoviruses.
17. What is involved in the release of pollen grains?
[A] Pectin and cellulose
[B] Lignocellulose
[C] Pollenkit
[D] Sporopollenin
Show Answer
Correct Answer: D [Sporopollenin]
Notes:
Sporopollenin is the most chemically inert organic polymer. It is a major component of the tough outer (outer) walls of plant spores and pollen grains.
18. Which of the following is not an auxiliary pigment?
[A] Chlorophyll ‘a’
[B] Chlorophyll ‘e’
[C] Phycocyanin
[D] Xanthophyll
Show Answer
Correct Answer: A [Chlorophyll ‘a’]
Notes:
Chlorophyll ‘a’ is an essential pigment, it is not helpful.
19. 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.
20. Bryophytes comprise__?
[A] The sporophyte is of longer duration
[B] Dominant phase of sporophyte which is parasitic
[C] Dominant phase of gametophyte which produces spores
[D] Small sporophyte phase and generally parasitic on the gametophyte
Show Answer
Correct Answer: D [Small sporophyte phase and generally parasitic on the gametophyte]
Notes:
The sporophyte is never independent inside the bryophytes, but parasitizes on the gametophytic plant, either partially for water and mineral supply or entirely for organic food.
