21. In gymnosperms, pollen drop is the__?
[A] Red drop
[B] Pollens dropped by wind
[C] Secretion of nucellus
[D] Water drops
Show Answer
Correct Answer: C [Secretion of nucellus]
Notes:
In gymnosperms, the pollen drop is a liquid droplet or a liquid nucellus secretion. It accumulates at the top of the ovum and when dried, it moves to the ovule of the gymnosperm for fertilization of the ovum.
22. The spread of plant pathogens through the air is called__.
[A] Hydrochory
[B] Zoochory
[C] Anemochory
[D] Anthorochory
Show Answer
Correct Answer: C [Anemochory]
Notes:
The spread of plant pathogens through the air is called Anemochory. The dispersal of seeds, spores, or fruit by the wind.
23. What causes wheat tundu disease?
[A] Pythium debaryanum
[B] Albygo candida
[C] Clavibacter tritici
[D] Puccinia striiformis
Show Answer
Correct Answer: C [Clavibacter tritici]
Notes:
Tundu disease of wheat is caused by infection with a bacterial pathogen called Clavibacter tritici.
24. What type of reptiles are turtles?
[A] Viviparous
[B] Oviparous
[C] Bisexual
[D] Parthenogenic
Show Answer
Correct Answer: B [Oviparous]
Notes:
Oviparous animals are female animals that lay their eggs, with little or no other embryonic development within the mother. Turtles are Oviparous.
25. Aerobic bones are found in which of the following?
[A] Domestic lizard
[B] Tadpole of frog
[C] Flying lizard
[D] Pigeon
Show Answer
Correct Answer: D [Pigeon]
Notes:
Aerobic bones are found in Pigeon. Columbidae is a bird family of pigeons. It is the only family in the order Columbiformes. These are thick-bodied birds with short necks and short slender bills, with fleshy grains in some species.
26. Which of the following animals have incisors that continue to grow their entire life?
[A] elephant
[B] walrus
[C] hamster
[D] lion
Show Answer
Correct Answer: C [hamster]
Notes:
Hamsters are rodents belonging to the subfamily Cricetinae. It consists of 19 species classified into seven genera.
27. How many of the following senses are there?
[A] Four
[B] Five
[C] Six
[D] None of these
Show Answer
Correct Answer: B [Five]
Notes:
There are five sense organs in the human body: eyes, ears, nose, tongue, skin.
28. Granulocytes and agranulocytes are a classification of which of the following?
[A] White blood cells
[B] Red blood cells
[C] Platelets
[D] Homeostasis
Show Answer
Correct Answer: A [White blood cells]
Notes:
Granulocytes and agranulocytes are a classification of White blood cells. Granulocytes are leukocytes, with the presence of granules in their cytoplasm while Agranulocytes are leukocytes, with the absence of granules in their cytoplasm.
29. Which of the following is not pure endocrine gland?
[A] Thyroid gland
[B] Thymus gland
[C] Pancreas
[D] Adrenal
Show Answer
Correct Answer: C [Pancreas]
Notes:
The pancreas and gonads are two glands that are not pure endocrine. The pancreas secretes both hormones and enzymes and acts as both endocrine and exocrine.
30. Which of the following hormone stimulates the lining of the uterus for fertilization?
[A] Progesterone
[B] Estrogen
[C] Glucagon
[D] Prolactin
Show Answer
Correct Answer: A [Progesterone]
Notes:
Progesterone hormone stimulates the lining of the uterus for fertilization.
