1 Principles of Inheritance and Variation
The incomplete dominance was found out in Mirabilis Jalaba by : 1) Mendel 2) Correns 3) Shull 4) Bateson
2
9 : 3 : 3 : 1 ratio is modified in complimentary genes as
(1) 5 : 8 : 3 (2) 9 : 7
(3) 13 : 1 (4) 12 : 3 : 1
3 The Living World
Which is correct about energy changes in living cells? 1) First energy transfer, then energy transformation 2) First energy transformation, then energy transfer 3) Both occur discontinuously 4) Both occur continuously
Solution
Organisms break down the sugar to release its stored energy. The energy released from the breakdown of sugar is used by the cells to make another chemical that we call adenosine triphosphate, or simply abbreviated ATP. Thus energy transfer and the energy transformation occur continuously
4
To tolerate water stress, plants in deserts develop
(1) Long root system which reaches to the water level
(2) No stomatal activity
(3) Both (1) and (2)
(4) Stems which are modified into leaf-type
5
Hypokinetic Hypoxia concerned to
(1) Reduced blood flow rate (2) Low O2– content in blood
(3) Low O2 in artery (4) Low oxygen content in venous blood
6 Molecular Basis of Inheritance
Chromosomes with genes ABCDEFGH becoming ABEDCFGH is due to 1) Duplication 2) Deletion 3) Translocation 4) Inversion
7
The current classification system was devised by: 1) Aristotle 2) Plato 3) Linneaus 4) Darwin
8
By which process are two daughter nuclei formed that are identical to each other and to the original nucleus?
Mitosis, the method of asexual reproduction, involves one parent producing two identical daughter cells. Examples of asexual reproduction are budding, binary fission, sporulation, regeneration, and vegetative propogation.
9 Cell Cycle and Cell Division
The spindle fibres arise from 1. Centriole 2. Centromere 3. Nucleus 4. Mitochondria
Spindle fibres originate from the centrioles during cell division and helps in the movement of chromosomes towards the pole. During metaphase, each chromosome gets attached to two spindle fibers, one from each pole, in the region of its kinetochores.
10 Transport in Plants
Imbibition, diffusion & osmosis play an important role in 1) Transpiration 2) Respiration 3) Photosynthesis 4) Absorption of water
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