1
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is :
A
Commensalism
B
Commensalism
C
Ectoparasitism
D
Symbiosis
2
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Besides paddy fields, cyanobacteria are also found inside vegetative part of :
A
Cycus
B
Psilotum
C
Pinus
D
Equisetum
3
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A biologist studied the population of rats in a barn, He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is :
A
15
B
05
C
10
D
zero
4
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Natural reservoir of phosphorus is :
A
Fossils
B
Rock
C
Sea water
D
Animal bones
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