Biology 2018 | Study Mode

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Question 1
A
Charles Darwin 
B
Carolus Linnaeus 
C
John Ray 
D
Louis Pasteur 
Explanation.
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Carolus Linnaeus, the swedish naturalist, is the man behind this present way of classifying plants and animals.


Correct Option:
B
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Question 2
A
Prothorax bears only legs 
B
Mesothorax bears only legs 
C
Metathorax bears only wings 
D
Prothorax bears only wings 
Explanation.
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The prothorax contains the first pair of legs in the arthropods. It's the first of the three segments of the thorax.


Correct Option:
A
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Question 4
A
Transpiration 
B
Digestion 
C
Cyclosis 
D
Osmosis 
Explanation.
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Cyclosis is also called Cytoplasmic streaming. It is defined as the streaming rotary motion of the protoplasm within certain cells and unicellular organisms. Paramecium is an example of a unicellular organism.


Correct Option:
C
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Question 5
A
Mitochondria 
B
Ribosomes 
C
Lysosomes 
D
Plastids 
Explanation.
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Plastids are found only in plants and algae. One common type of plastid is the chloroplast.


Correct Option:
D
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Question 6
A
is a very fast process 
B
allows the movement of substances against concentration gradient 
C
takes place in both light and dark reaction of photosynthesis 
D
occurs in both plant and animal tissues 
Explanation.
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Diffusion, as well as osmosis depends only on concentration gradient but active transport works against concentration gradient.


Correct Option:
B
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Question 7
A
phototropism 
B
geotropism 
C
hydrotropism 
D
thigmotropism 
Explanation.
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From the first diagram, you notice the roots of the plants bending towards the porous water pot, hence this is a form of response in the direction of the stimuli of the water. This is a form of hydrotropism.


Correct Option:
C
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Question 8
A
shoots of plants are negatively thigmotropic 
B
shoots of plants are negatively geotropic 
C
shoots of plants are positively phototropic 
D
roots of plants are positively hydrotropic 
Explanation.
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The roots of the plants in diagram 1 bend towards the porous clay pot while growing and the well watered soil sees the plants growing straight and erect. The roots of the plants are positively hydrotropic (respond towards the pull of water positively).


Correct Option:
D
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Question 9
A
axis vetebra 
B
atlas vetebra 
C
thoracic vetebra 
D
sacral vetebra 
Explanation.
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The odontoid process is a projection of the axis vetebra. It is seen at its point of joining with the body.


Correct Option:
A
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Question 10
A
the importance of micro elements to plants 
B
ascent of water through the xylem 
C
diffusion of colored substances 
D
distribution of food in plants 
Explanation.
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No official Explanation yet!


Correct Option:
C
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