Zoology & Botany MCQs
Q.1
Phylogenetic system of classification was proposed by -
(a) Linnaeus
(b) Bentham
(c) Hutchinson
(d) Eichler
Ans. (c)
Phylogenetic system of classification was proposed by John Hutchinson. He also proposed 24 principles of phylogeny.
Q.2
The term protoplasm was coined by -
(a) R Virchow
(b) Purkinje
(c) Dujardin
(d) Kollikar
Ans. (b)
Protoplasm was described as physical basis of life. The term was coined by Purkinje a Bohemian physiologist in 1839.
Q.3
In Ulothrix meiosis occur in -
(a) zygospore
(b) zoospore
(c) gamete
(d) thallus
Ans. (a)
In Ulothrix meiosis occurs in the zygospore (2n) after a small resting period.
Q.4
Which one of the following is considered as a recessive character of Mendel?
(a) Round seed
(b) Wrinkled seed
(c) Axial flower
(d) Green pod
Ans. (b)
Mendel used round seeds as dominant over wrinkled seeds. Axial flower was considered dominant over terminal flower and green pod dominant over yellow.
Q.5
Decomposers are -
(a) autotrophs
(b) heterotrophs
(c) organotrophs
(d) autoheterotrophs
Ans. (b)
Decomposers are heterotrophs living on dead organic matter on releasing simple inorganic compounds from comples organic forms.
Q.6
The real force responsible for the movement of water from cell to cell is -
(a) OP
(b) TP
(c) DPD
(d) WP
Ans. (c)
The real force responsible for movement of water is Diffusion Pressure Deficit (DPD), now known as -
Water Potential
DPD = OP - TP
Q.7
In Opuntia the spines are modification of
(a) branch
(b) leaf
(c) flower
(d) epidermis
Ans. (b)
In Opuntia the leaves modify into spines, this modification of leaves prevents excess transpiration in xeric habitats.
Q.8
The causal organism of disease 'witiches broom' is -
(a) bacterium
(b) virus
(c) mycoplasma
(d) fungus
Ans. (c)
The causal organism of disease 'witiches broom' is mycoplasma, better known as Pleuro Pneumonia Like Organisms (PPLO). These moneran lack cell wall and is often called as 'Joker of Plant Kingdom'.
Q.9
In the phosphorus cycle weathering makes phosphate available first to
(a) producers
(b) consumers
(c) decomposers
(d) All components of ecosystems
Ans. (a)
In the phosphorus cycle weathering makes phosphate available first to the soil from where green plants or producers get it first and then recycled.
Q.10
Who developed crescograph -
(a) Dr B Sahani
(b) MOP Iyengar
(c) K C Mehta
(d) Sir Jagdish Chandra Bose
Ans. (d)
Sir Jagdish Chandra Bose invented crescograph for detecting minute responses of plants to external stimulus, e.g.' in Mimosa pudica (touch me not).
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