11. Which of the following biologist is related to Cell Theory?
[A] Carl Linnaeus
[B] Theophrastus
[C] Theodor Schwann
[D] Francis Galton
Show Answer
Correct Answer: C [Theodor Schwann]
Notes:
The classical cell theory was proposed by Theodor Schwann in 1839. There are three parts to this theory. The first part states that all organisms are made up of cells. The second part states that cells are the basic units of life. The third part, which claims that cells come from pre-existing cells that have multiplied, was described by Rudolf Virchow in 1858.
12. A.I. Oparin is related to which of the following theories in the field of biology?
[A] Chemosynthetic theory
[B] A Theory of Life
[C] Infectious Disease Theory
[D] A Theory of the Origin of Eukaryotic Cells
Show Answer
Correct Answer: A [Chemosynthetic theory]
Notes:
The Chemosynthetic theory of origin of life was proposed by A.I. Oparin. Chemosynthetic theory states that life originated on earth through a series of collections of chemical elements in the water.
13. How many cells are in the human brain?
[A] roughly 171 billion cells
[B] roughly 200 billion cells
[C] roughly 151 billion cells
[D] roughly 250 billion cells
Show Answer
Correct Answer: A [ roughly 171 billion cells]
Notes:
The average male brain contains about 171 billion cells, including about 86 billion neurons.
14. Which is the female reproductive organ of Bryophyta?
[A] Antheridium
[B] Oogonium
[C] Archegonium
[D] Sporangium
Show Answer
Correct Answer: C [Archegonium]
Notes:
The female sex organ is called the archegonium. It has a tubular neck and a swollen venter-shaped flask.
15. The sporophytic and gametophytic stages are independent in__?
[A] Bryophytes
[B] Pteridophytes
[C] Phaeophytes
[D] Gymnosperms
Show Answer
Correct Answer: B [Pteridophytes]
Notes:
Pteridophytes show alternation of generations, in which they exhibit a dominant sporophytic generation with an inconspicuous gametophytic generation. The sporophyte is differentiated into root, stem and leaves whereas, the small and inconspicuous gametophyte is independent and autotrophic.
16. Which of the following is a calyx?
[A] the second whorl of a flower
[B] the third whorl of the flower
[C] the outermost whorl of a flower
[D] None of these
Show Answer
Correct Answer: C [the outermost whorl of a flower]
Notes:
The calyx is the outermost whorl of a flower, consisting of sepals, small leaves present at the base of the flower. These protect the flowering clump against mechanical injury and drying. The calyx in some plants is colored sepals called petaloid.
17. Carbon Dioxide from the air is trapped by which of the following parts of the plant?
[A] Petals
[B] Root hairs
[C] Stomata
[D] Mitochondria
Show Answer
Correct Answer: C [Stomata]
Notes:
Carbon dioxide in the air is trapped by stomata. It captures Carbon dioxide from the surface of the leaves and CO2 enters through the tiny pores present on leaves called stomata.
18. Which of the following is not a class of phylum Mollusca?
[A] Gastropoda
[B] Scaphopoda
[C] Decapoda
[D] Cephalopoda
Show Answer
Correct Answer: C [Decapoda]
Notes:
Decapoda is not a class of phylum Mollusca, they belong to phylum Arthropoda. Decapoda is an order of crustaceans within the class Malacostraca. This includes many familiar groups, such as crabs, lobsters, crayfish, shrimp, and prawns.
19. A newt is a salamander in the subfamily __
[A] Ambystomatidae
[B] Sirenidae
[C] Cryptobranchidae
[D] Pleurodelinae
Show Answer
Correct Answer: D [Pleurodelinae]
Notes:
A newt is a salamander in the subfamily Pleurodelinae. Newts are semi-aquatic amphibians.
20. Kangaroo is a member of which order?
[A] Monotremata
[B] Marsupialia
[C] Prototheria
[D] Insectivora
Show Answer
Correct Answer: B [Marsupialia]
Notes:
Kangaroo is a mammal with a pouch. It is related to Marsupialia. Prototheria and Monotremata are primitive mammals.
