Plants absorb dissolved nitrates from soil and convert them into
Anonymous Quiz
36%
A.free nitrogen
21%
B.urea
29%
C.ammonia
14%
D.proteins
Process of cell division can take place by
Anonymous Quiz
8%
A.heterosis
34%
B.fusion
54%
C.mitosis
4%
D.None of these
The nucleus of an atom consists of
Anonymous Quiz
14%
A.electrons and neutrons
24%
B.electrons and protons
34%
C.protons and neutrons
29%
D.All of the above
Wind energy is harnessed as ______ energy with the help of windmill or turbine.
Anonymous Quiz
47%
(A) Mechanical
22%
(B) Solar
28%
(C) Electrical
3%
(D) Heat
The national currency of Sri Lanka is ______.
Anonymous Quiz
46%
Rupee
11%
Euro
22%
Kyat
20%
Ringgit
The natural place of an organism or community is known as
Anonymous Quiz
14%
Niche
15%
Biome
67%
Habitat
5%
Habit
Which statement is correct with respect to the food chain?
Anonymous Quiz
12%
Every component of food chain forms trophic level
20%
Inter-relation between different food chains is known as a food web
13%
All the chains formed by nutritional relations is used to understand energy flow.
55%
All of the above
Which of the following requires maximum energy?
Anonymous Quiz
18%
Secondary consumer
23%
Decomposer
28%
Primary consumer
31%
Primary producer
The ratio between energy flow at different points in a food chain is known as
Anonymous Quiz
16%
Ecological capacity
36%
Ecological efficiency
26%
Ecological assimilation
22%
Ecological potential
The ability of a population to increase under ideal environmental conditions is called
Anonymous Quiz
20%
Natality
25%
Carrying capacity
42%
Biotic potential
13%
Absolute natality
In an ecosystem, the energy flow is always
Anonymous Quiz
49%
Always unidirectional
22%
Always bidirectional
20%
In any direction
9%
Always down directional
Which of the following is a fat-soluble vitamin?
Anonymous Quiz
11%
Vitamin B
18%
Vitamin C
33%
Vitamin B12
37%
Vitamin K
The pyramid of energy is always upright” states that
Anonymous Quiz
30%
The energy conversion efficiency of herbivores is better than carnivores
25%
The energy conversion efficiency of carnivores is better than herbivores
26%
Producers have the lowest energy conversion efficiency
19%
Energy conversion efficiency is the same in all trophic levels.
The upper part of an aquatic ecosystem contains
Anonymous Quiz
11%
Nekton
38%
Plankton
11%
Benthos
40%
both (1) and (2)
What type of food chain is it?
dead animals → blowfly maggot → maggots → frog → snake
dead animals → blowfly maggot → maggots → frog → snake
Anonymous Quiz
26%
Detrital food chain
46%
Decomposer food chain
20%
Predator food chain
9%
Grazing food chain
What is correct for the artificial ecosystem ?
Anonymous Quiz
27%
Biodiversity is less
16%
Biodiversity is High
34%
Ecosystem is can not be form by human
23%
It is more stable than Netural ecosystem
UNIVAC stands for
Anonymous Quiz
12%
Unique Automatic Computer
20%
Universal Array Computer
11%
Unvalued Automatic Computer
57%
Universal Automatic Computer
Which of the following is the first generation computer?
Anonymous Quiz
10%
CDC
26%
IBM
7%
ICL
57%
UNIVAC
How are registers measured?
Anonymous Quiz
20%
Number of programs
40%
Number of bits
20%
Number of Occurence
20%
Number of reference points