11.To which plant kingdom does Wolffia belong?
[A] Angiosperms
[B] Gymnosperms
[C] Pteridophytes
[D] None of these
Correct Answer: A [Angiosperms]
Notes:
Wolffia belong to Angiosperms. Angiosperms are seed-bearing vascular plants that have a well-differentiated plant body. The seeds of angiosperms are enclosed within the fruit.
12.Where does a functional megaspore develop in an angiosperm?
[A] Endosperm
[B] Embryo
[C] Embryo-sac
[D] Ovule
Correct Answer: C [Embryo-sac]
Notes:
Functional megaspore in an angiosperm develops into Embryo-sac. The embryo sac is an oval structure present in the ovule of flowering plants.
13.Stem arises from which of these structures?
[A] internodes
[B] nodes
[C] radicle
[D] plumule
Correct Answer: D [plumule]
Notes:
Stem arises from plumule. The plumule develops into the first true leaf shoots or stems and is also referred to as the future shoots of the plant.
14.Example of false fruit.
[A] Strawberry
[B] Apple
[C] Cashew
[D] All of the above
Correct Answer: B [Apple]
Notes:
False fruits include seedless fruits. Some examples of false fruits are apple, pear, gourd and cucumber which develop from the thalamus.
15.Which one of the following is a limbless lizard?
[A] Hemidactylus
[B] Chamelion
[C] Anguis
[D] Phrynosoma
Correct Answer: C [Anguis]
Notes:
Anguis is a limbless or legless lizard in the family Anguidae. They are also called slowworms or blindworms.
16.The long hollow bones and connected air sacs are the characteristic features of?
[A] Mammals
[B] Reptilia
[C] Aves
[D] None of the above
Correct Answer: C [Aves]
Notes:
The long hollow bones and connected air sacs are the characteristic features of Aves. Aves are warm-blooded animals and have four-chambered hearts.
17.Which of the following bird is viviparous?
[A] Penguin
[B] Humming bird
[C] Albatross
[D] None of these
Correct Answer: D [None of these]
Notes:
Birds constitute the only vertebrate class that is both rich in species number and exclusively oviparous whereas mammals are viviparous animals.
18.Which of the following animals is used in the production of fabric?
[A] Alpaca
[B] Llama
[C] Yak
[D] All of the above
Correct Answer: D [All of the above]
Notes:
Alpaca, Llama, and yak animals are used in the production of fabric. The yak is an animal that is largely found in the Himalayas in India and Tibet, Llamas are animals typically found in South America and Alpacas are small camel-like animals found largely in South America.
19.Afferent neurons carry nerve impulses from
[A] CNS to muscles
[B] CNS to receptors
[C] receptors to CNS
[D] effector organs to CNS
Correct Answer: C [receptors to CNS]
Notes:
Afferent neurons are sensory neurons that carry nerve impulses from sensory stimuli toward the central nervous system and brain. Efferent neurons are motor neurons that carry nerve impulses away from the central nervous system and cause movement toward muscles.
20.Which of the following is the function of cones in the eye?
[A] Secretion and balances
[B] Vision in darkness
[C] Monocular vision
[D] Vision in the high beam light and colour differentiation
Correct Answer: D [Vision in the high beam light and colour differentiation]
Notes:
Cones are the type of retinal cells that function best in bright light, detecting fine detail and color.
