11. Which of the following is the largest group of the plant kingdom?
[A] Thallophyta
[B] Bryophyta
[C] Pteridophyta
[D] Euglena
Show Answer
Correct Answer: A [Thallophyta]
Notes:
The plant kingdom consists of 390,000 species known till date. The plant kingdom is divided into five major groups: Thallophyta, Bryophyta, Pteridophyta, Gymnosperms and Angiosperms.
12. How do small molecules pass through the outer membrane of mitochondria?
[A] Carrier protein
[B] Channels
[C] Porins
[D] ATP pump
Show Answer
Correct Answer: C [Porins]
Notes:
The outer membrane is a relatively simple phospholipid bilayer made up of protein structures called porins. This makes it permeable to molecules of about 10 kilodaltons or less.
13. Which sugar is present in RNA?
[A] Hexose
[B] Ribose
[C] Fructose
[D] Glucose
Glucose
Show Answer
Correct Answer: B [Ribose]
Notes:
Ribose is a simple sugar present in RNA. The chemical formula of ribose is C5H10O5, Hexose (C6H1206), Glucose (C6H12O6).
14. Who coined the term Bryophyta?
[A] Darwin
[B] Brown
[C] Aristotle
[D] Galen
Show Answer
Correct Answer: B [Brown]
Notes:
The term Bryophyta was coined by Robert Brown in 1864. He included algae, fungi, lichens, and mosses under it.
15. On which of the following factor rates of photosynthesis depends?
[A] pH
[B] Pressure
[C] Intensity of Light
[D] Amount of reactance
Show Answer
Correct Answer: C [Intensity of Light]
Notes:
The rate of photosynthesis mainly depends on the Intensity of Light, carbon dioxide concentration, and temperature.
16. The mode of nutrition in which organisms make their own food from simple substances is called __.
[A] autotrophic
[B] heterotrophs
[C] saprotrophs
[D] Host
Show Answer
Correct Answer: A [autotrophic]
Notes:
The mode of nutrition in which organisms make their own food from simple substances is called autotrophic.
17. What does apomixis mean?
[A] Fruit with seed
[B] Fruit without seed
[C] Fruit without fertilization
[D] Seed without fertilization
Show Answer
Correct Answer: D [Seed without fertilization]
Notes:
Apomixis means Seed without fertilization. Apomictic parthenogenesis in which an egg cell develops directly into an embryo without prior fertilization.
18. Identify the characteristics of acoelomates from the following-
[A] Absence of mesoderm
[B] Absence of brain
[C] Coelom that is incompletely lined with a mesoderm
[D] Solid-body without a cavity surrounding internal organs
Show Answer
Correct Answer: D [Solid-body without a cavity surrounding internal organs]
Notes:
Acoelomates do not have a body cavity or coelom. This fluid-filled cavity is absent between the digestive tract and the body wall that surrounds other internal organs as well.
19. Which of the following are lower invertebrates?
[A] Porifera
[B] Platyhelminthes
[C] Nematoda
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Lower invertebrates are simpler in body organization. They include Protozoa, Porifera, Coelenterata (Cnidaria), Platyhelminthes, and Nematoda.
20. Schistosoma and Fasciola are examples of which Phylum?
[A] Ctenophora
[B] Porifera
[C] Aschelminthes
[D] Platyhelminthes
Show Answer
Correct Answer: D [Platyhelminthes]
Notes:
Schistosoma and Fasciola are examples of Platyhelminthes. Schistosoma causes Schistosomiasis which spreads through contaminated water and Fasciola causes fascioliasis in animals in which the liver of the animal enlarges and the bile ducts are blocked.
