21. Flowers having both androecium and gynoecium are called?
[A] Bisexual flowers
[B] Anther
[C] Stamens
[D] Unisexual flowers
Show Answer
Correct Answer: A [Bisexual flowers]
Notes:
Flowers having both androecium and gynoecium are called Bisexual flowers. Flowers are the reproductive part of the plant. They are not only involved in reproduction but are also a source of food for other living organisms.
22. Which of the following are napiform roots?
[A] swollen in the middle and tapering towards both the ends
[B] broad at the base and conical at the apex
[C] no specific shape
[D] spherical at the base and taper towards the apex
Show Answer
Correct Answer: D [spherical at the base and taper towards the apex]
Notes:
Napiform roots are rounded at the base and taper towards the apex, an example of a turnip.
23. Spiders, butterflies, and mosquitoes belong to which of the following?
[A] Mollusca
[B] Echinodermata
[C] Annelida
[D] Arthropoda
Show Answer
Correct Answer: D [Arthropoda]
Notes:
Spiders, butterflies, and mosquitoes belong to Arthropoda. This means jointed legs. This is the largest phylum in the animal kingdom.
24. Cuttlefish is a member of which of the following?
[A] Mollusca
[B] Echinodermata
[C] Pisces
[D] Amphibia
Show Answer
Correct Answer: A [Mollusca]
Notes:
Cuttlefish is a member of Mollusca. They belong to the class Cephalopoda, which also includes squid, octopus and nautilus.
25. To which family does true toad belong?
[A] Pelobatidae
[B] Leptodactylidae
[C] Bufonidae
[D] Hylidae
Show Answer
Correct Answer: C [Bufonidae]
Notes:
True Toads belong to the Bufonidae family. True toad’s skin is very warty with glands behind the eyes. Secretes a poisonous substance with a bad taste as a protection against predators. They have short legs designed for jumping rather than leaping.
26. Mature females lay eggs and birds develop with the formation of four embryonic membranes known as__
[A] chorion
[B] amnion
[C] allantoin
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Mature females lay eggs and birds develop with the formation of four embryonic membranes known as chorion, amnion, allantoin, and sac of yolk.
27. Which of the following mammal lays eggs?
[A] Porcupine
[B] Platypus
[C] Kangaroo
[D] Koala
Show Answer
Correct Answer: B [Platypus]
Notes:
There are only two types of egg-laying mammals left on the planet today, the duck-billed platypus and the echidna.
28. Which layer has the highest concentration of keratin and lamellar granules?
[A] Stratum Basale
[B] Stratum Spinosum
[C] Stratum Corneum
[D] Stratum Granulosum
Show Answer
Correct Answer: C [Stratum Corneum]
Notes:
The Stratum Corneum layer has the highest concentration of keratin and lamellar granules. Stratum Corneumlayer contains 25-30 layers of dead flattened keratinocytes
29. Blood is a fluid connective tissue consisting of?
[A] plasma
[B] blood cells
[C] platelets
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Blood is a liquid connective tissue consisting of plasma, blood cells, and platelets. It circulates throughout our body, carrying oxygen and nutrients to various cells and tissues.
30. __ is the decrease in glomerular filtration in humans.
[A] Renal failure
[B] Uremia
[C] Renal Calculi
[D] Nephritis
Show Answer
Correct Answer: A [Renal failure ]
Notes:
Renal failure is the decrease in glomerular filtration in humans. It is also called Kidney failure.
