Biology MCQs
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 is similar to autogamy, but requires pollinators?
[A] Geitonogamy
[B] Cleistogamy
[C] Apogamy
[D] Xenogamy
Show Answer
Correct Answer: A [Geitonogamy]
Notes:
Geitonogamy is similar to autogamy but requires pollinators. Autogamy is the pollination of a flower by its own pollens. Same geitonogamy is the pollination of one flower by the pollen grains of another flower on the same plant.
23. 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.
24. Which of the following are examples of tap root systems?
[A] Mustard
[B] Carrots
[C] Beetroot
[D] All of the above
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Correct Answer: D [All of the above]
Notes:
Taproots have one main central root. These are attached to small, lateral roots called root hairs. Mustard, carrot, beet, parsley, Chinese rose and all are examples of dicotyledonous roots.
25. Into how many subclasses are reptiles divided?
Show Answer
Correct Answer: B [3]
Notes:
The class Reptilia is divided into three major sub-classes: Anapsida, Parapsida, and Diapsida.
26. How is leather obtained from animals?
[A] Fracking
[B] Stunning
[C] Tanning
[D] All of these
Show Answer
Correct Answer: C [Tanning]
Notes:
Tanning is the process of treating animal hides and hides for the production of leather.
27. Which bone protects the brain?
[A] Calcium
[B] The cranium
[C] The cerebrum
[D] The cerebellum
Show Answer
Correct Answer: B [The cranium]
Notes:
The cranium, or skull, protects the delicate brain from damage. Unless the cerebrum is damaged, the ability to speak, see and remember should remain mostly intact.
28. Which of the following bones listed is an example of a long bone?
[A] Ribs
[B] Ulna
[C] Phalanges
[D] Phalanges
Show Answer
Correct Answer: B [Ulna]
Notes:
Ulna is located in the medial forearm when the arm is in the anatomical position.
29. What kind of muscle is the myocardium made of?
[A] Epithelial Cells
[B] Cardiac muscle cells
[C] Nerve Cells
[D] None of these
Show Answer
Correct Answer: B [Cardiac muscle cells]
Notes:
The myocardium is the muscular layer of the heart. It consists of cardiac muscle cells arranged in an overlapping spiral pattern.
30. What is the name of the part of the stomach attached to the esophagus?
[A] Fundus
[B] Pylorus
[C] Duodenum
[D] Cardia
Show Answer
Correct Answer: D [Cardia]
Notes:
Cardia is the part of the stomach that is closest to the esophagus and attached to it.
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