11. Which of the following also play a role in protecting plants against bacterial and fungal infections?
[A] Jasmonates
[B] Oligosaccharins
[C] Strigolactones
[D] Brassinosteroids
Show Answer
Correct Answer: B [Oligosaccharins]
Notes:
Oligosaccharides also play a role in protecting plants against bacterial and fungal infections. They act locally at the site of injury. They can also be carried to other tissues.
12. Which plant disease is known as ring disease?
[A] Citrus Canker
[B] Black arm of cotton
[C] Wilt of Potato
[D] None of the above
Show Answer
Correct Answer: C [Wilt of Potato]
Notes:
Wilt of Potato is caused by a soil-borne bacterium called Ralstonia solanacearum. Potato wilting bacteria primarily reside in the roots and enter the root system at points of injury from farm tools or equipment and soil pests.
13. What are the features of Phylum Mollusca?
[A] Less segmented body
[B] Typically, open circulatory system
[C] Limbs are present
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Phylum Mollusca is a large group of animals. They have a bilaterally symmetrical and triploblastic, Less segmented body, well-developed organ and organ system, typically, open circulatory system and Limbs are present.
14. The flagellated cells that line the spongiocoel in poriferans are called__.
[A] ostia
[B] mesenchymal cells
[C] choanocytes
[D] oscula
Show Answer
Correct Answer: C [choanocytes]
Notes:
The flagellated cells that line the spongiocoel in poriferans are called choanocytes. Choanocytes are found in sponges and the phylum to which it belongs is known as pore bearer.
15. What would you call the study of fish?
[A] Ichthyology
[B] Herpetology
[C] Saurology
[D] Ornithology
Show Answer
Correct Answer: A [Ichthyology]
Notes:
Ichthyology is the study of fish including bony fish, cartilaginous fish, and jawless fish.
16. The material covering the bones of reptiles is?
[A] Calcium
[B] Chitin
[C] Keratin
[D] None
Show Answer
Correct Answer: C [Keratin]
Notes:
The material covering the bones of reptiles is Keratin and their skin is dry, and rough, without any glands.
17. Eagles, hawks, and falcons belong to which order?
[A] Galliformes
[B] Falconiformes
[C] Psittaciformes
[D] Strigiformes
Show Answer
Correct Answer: B [Falconiformes]
Notes:
Eagles, hawks, and falcons belong to the Falconiformes order, and they have short beaks, strong legs, hooked claws, sharp nails, and eyesight.
18. Which of the following group of mammals, the placenta is absent?
[A] Prototheria
[B] Metatheria
[C] Eutheria
[D] Theria
Show Answer
Correct Answer: A [Prototheria]
Notes:
Prototheria group of mammals in which the placenta is absent. Prototheria is a subclass to which the orders Monotremata.
19. The class of phylum Chordata to which bat belongs?
[A] Mammalia
[B] Reptilia
[C] Aves
[D] Amphibia
Show Answer
Correct Answer: A [Mammalia]
Notes:
Bats belong to the class Mammalia. The bat is a member of the phylum Chordata because they have bilateral symmetry and are triploblastic.
20. The order Cetacea includes which of the following group?
[A] Monkey, gorilla, and man
[B] Cat, dog, wolf, and lion
[C] Whale, dolphin, and porpoise
[D] Hippopotamus, pig and giraffe
Show Answer
Correct Answer: C [Whale, dolphin, and porpoise]
Notes:
Cetaceans are aquatic mammals that constitute the infra-order Cetacea, including whales, dolphins, and porpoises.
