11. What is the size of phloem tissue?
[A] tubular-shaped and elongated
[B] Oval-shaped
[C] polygonal-shaped
[D] None of these
Show Answer
Correct Answer: A [tubular-shaped and elongated]
Notes:
Phloem tissues are tubular-shaped, elongated, thin sieve tubes with the appearance of walls.
12. Which of the following is not a function of Ethylene?
[A] stimulates the conversion of starch and acids to sugars
[B] promotes germination in some cereals
[C] stimulate shoot elongation, seed germination
[D] fruit ripening, flower wilting, and leaf fall
Show Answer
Correct Answer: C [stimulate shoot elongation, seed germination]
Notes:
The function of Ethylene – stimulates the conversion of starch and acids to sugars, promotes germination in some cereals, and sprouting of bulbs and potatoes and is also associated with fruit ripening, flower wilting, and leaf fall.
13. Which of the following is located inside the embryo sac?
[A] Stigma
[B] Ovule
[C] Micropyle
[D] Style
Show Answer
Correct Answer: B [Ovule]
Notes:
The ovule is located inside the embryo sac. The embryo sac develops within the ovule surrounded by the nucellus, which in turn is surrounded by integuments.
14. Which of the following is called Calyx?
[A] the outermost whorl of a flower
[B] consists of many numbers of petals
[C] four-lobed sac-like structure responsible for pollen formation
[D] thread-like structures are attached to the anther
Show Answer
Correct Answer: A [the outermost whorl of a flower]
Notes:
The calyx is the outermost circle of a flower. It includes units called sepals.
15. Sweet potato is an example of which root?
[A] Conical roots
[B] Fusiform roots
[C] Tuberous roots
[D] Both 1 and 2
Show Answer
Correct Answer: C [Tuberous roots]
Notes:
Sweet potato is an example of Tuberous roots. Tuberous roots have no distinctive shape, appearing thick and fleshy.
16. What is the function of the leaf?
[A] Helps in the introduction of florals
[B] Interested in gas-exchange
[C] Both 1 and 2
[D] Involved in seed development
Show Answer
Correct Answer: C [Both 1 and 2]
Notes:
Leaf function helps with flower initiation, is interested in gas exchange, serves as a plant food storage unit, synthesizes food through a process known as photosynthesis, excess water It plays an important role in the removal of small pores called a stomata.
17. Phylum Annelida is not characterized by__
[A] segmentation
[B] closed circulatory system
[C] ventral nerve chord
[D] pseudocoelom
Show Answer
Correct Answer: D [pseudocoelom]
Notes:
Pseudocoelom is found in animals belonging to the phylum Nematoda or Aschelminthes. The pseudocoelom is a fluid-filled body hole that extends inside the outer body wall of the nematode.
18. How many million years ago did adaptive radiation begin in fish?
[A] 1200
[B] 500
[C] 1000
[D] 1500
Show Answer
Correct Answer: B [500]
Notes:
500 million years ago did adaptive radiation began in fish. Fish are a type of animal known as a vertebrate – this means they have a backbone.
19. The branch of zoology concerned with the study of reptiles s called__.
[A] Herpetology
[B] Entomology
[C] Ornithology
[D] Ichthyology
Show Answer
Correct Answer: A [Herpetology]
Notes:
Herpetology is the branch of zoology concerned with the study of amphibians (including frogs, toads, salamanders, newts, and caecilians (gymnophiona)) and reptiles (including snakes, lizards, amphisbaena, turtles, terrapins, tortoises, crocodilians, and the tuataras). It is the study of ectothermic (coldblooded) tetrapods.
20. Flight muscles of birds are attached to:
[A] Clavicle
[B] Coracoid
[C] Keel of sternum
[D] Scapula
Show Answer
Correct Answer: C [Keel of sternum]
Notes:
Flight muscles of birds are attached to the Keel of the sternum. The keel bone provides the main attachment for the flight muscles.
