interactive questions 08
TRANSCRIPT
-
7/31/2019 Interactive Questions 08
1/53
Organisms andtheir environment
INTERACTIVE
MULTIPLE CHOICEQUESTIONS
The answers are provided.
Explanations of why the alternativesare unsatisfactory are also offered
-
7/31/2019 Interactive Questions 08
2/53
These multiple choice questions are similar to the ones
set by the GCSE and IGCSE Examination Boardsexcept that, in some cases, there may be more than one
acceptable answer
For this reason, even if you select a correct answer atyour first attempt, it is worth looking at all the
alternatives
(a) to see if there is a better answer and
(b) to see why some of the alternatives are
unacceptable
Question 1
-
7/31/2019 Interactive Questions 08
3/53
A thrush, a snail, a cabbage and a sparrow hawk are all part
of a food chain. Which of them is a primary (or first
order) consumer?
(a) The cabbage
(b) The snail
(d) The thrush
(c) The sparrow hawk
Question 1
Question 2
-
7/31/2019 Interactive Questions 08
4/53
The cabbage is theproducerat the beginning of the food chain
No
-
7/31/2019 Interactive Questions 08
5/53
The snail is theprimary (first order) consumer. It eats
the cabbage leaves
Yes
-
7/31/2019 Interactive Questions 08
6/53
The sparrow hawk is a tertiary(third order) consumer
at the end of the food chain. It is a predator of the thrush
No
-
7/31/2019 Interactive Questions 08
7/53
The thrush is the secondary(second order) consumer. It
eats the snail and is itself eaten by the sparrow hawk
No
-
7/31/2019 Interactive Questions 08
8/53
In the nitrogen cycle, the bacteria in root nodules of
leguminous plants can convert atmospheric nitrogen into
nitrates. These bacteria are called
(a) nitrifying bacteria
(b) denitrifying bacteria
(c) nitrite bacteria
(d) nitrogen-fixing bacteria
Question 2
Question 3
-
7/31/2019 Interactive Questions 08
9/53
Although the bacteria in root nodules ultimately increase the
nitrogen content of the soil, the term nitrifyingbacteria
applies mainly to bacteria living freely in the soil. Thesebacteria cannot use atmospheric nitrogen.
No
-
7/31/2019 Interactive Questions 08
10/53
Denitrifying bacteria convert the nitrates in the soil
into atmospheric nitrogen.
No
-
7/31/2019 Interactive Questions 08
11/53
Nitrite bacteria live freely in the soil and convert ammonium
ions into nitrates. They cannot use atmospheric nitrogen
No
-
7/31/2019 Interactive Questions 08
12/53
The nitrogen-fixing bacteria (Rhizobium spp) live mainly in
root nodules of leguminous plants. They convert nitrogen
(from the air in the soil) into nitrates, which are eventually
incorporated into amino acids by the plant.
Yes
-
7/31/2019 Interactive Questions 08
13/53
Question 3 sunlight
PRODUCERS
CONSUMERS
die
SOIL
die
decayminerals
and salts
A
eatenThe diagram
represents a
natural
recycling
process
What is missing atA?
(a) Animals
(b) Plants
(c) Decomposers
(d) Bacteria Question 4
-
7/31/2019 Interactive Questions 08
14/53
No
Animals are the consumers
-
7/31/2019 Interactive Questions 08
15/53
No
Plants are the producers
-
7/31/2019 Interactive Questions 08
16/53
Yes
The decomposers, (mainly bacteria and fungi) break
down the dead remains of organisms and release their
products into the soil
-
7/31/2019 Interactive Questions 08
17/53
No
Some bacteria are important decomposers, but there are
many species of bacteria which are not decomposers. Also,
there are many fungi which play a part in decay.
-
7/31/2019 Interactive Questions 08
18/53
Question 4
In a food chain, the amount of energy passed from one
trophic level to the next .
(a) increases
(b) decreases
(c) stays the same
(d) sometimes increases;
sometimes decreases
Question 5
-
7/31/2019 Interactive Questions 08
19/53
No
The organisms at any trophic level will be using part of
their resources to produce energy, so there will be less to
pass to the next level
-
7/31/2019 Interactive Questions 08
20/53
Yes
The organisms at any trophic level will be using part of
their resources to produce energy, so there will be less to
pass to the next level
-
7/31/2019 Interactive Questions 08
21/53
No
The organisms at any trophic level will be using part of
their resources to produce energy, so there will be less to
pass to the next level
-
7/31/2019 Interactive Questions 08
22/53
No
The amount of energy passed from one trophic level
to the next may vary but there is always a decrease
-
7/31/2019 Interactive Questions 08
23/53
Question 5population
A
B
C
time
The graph shows the sigmoid
curve for population growth.
At C
(a) the death rate exceeds
the reproduction rate
(c) the death rate and repro-
duction rates are the same
(d) the death rate and repro-
duction rate decrease equally
(b) the reproduction rate
exceeds the death rate
Question 6
-
7/31/2019 Interactive Questions 08
24/53
No
If the death rate exceeds the reproduction rate,
the population will decrease
-
7/31/2019 Interactive Questions 08
25/53
No
If the reproduction rate exceeds the death rate, the
population will continue to grow
-
7/31/2019 Interactive Questions 08
26/53
Yes
If organisms die at the same rate as they are created, the
population will be stable
-
7/31/2019 Interactive Questions 08
27/53
Yes
If fewer organisms are created, but the death rate decreases at
the same rate, the population will stay the same but the point
of stability will be reached at a lower population level
-
7/31/2019 Interactive Questions 08
28/53
Question 6
What is the source of energy on which nearly all living
organisms ultimately depend?
(a) Photosynthesis
(b) Respiration
(c) Combustion
(d) Sunlight
Question 7
-
7/31/2019 Interactive Questions 08
29/53
No
Nearly all living organisms depend directly or indirectly on
photosynthesis by plants for their energy supply. But this is
not the ultimate source of energy
-
7/31/2019 Interactive Questions 08
30/53
No
Respiration is the way in which most living organisms
derive energy from their food but it is not the ultimate
source of energy
-
7/31/2019 Interactive Questions 08
31/53
No
Combustion is a source of energy for many processes but
not for living organisms
-
7/31/2019 Interactive Questions 08
32/53
Yes
The process of photosynthesis in green plants uses energy
from sunlight for making food. The energy from this food is
used by nearly all living organisms either by eating plants or
eating each other
-
7/31/2019 Interactive Questions 08
33/53
Question 7
Which of the following gases are the cause of acid rain?
(a) Carbon dioxide
(b) Carbon monoxide
(c) Nitrogen oxide
(d) Sulphur dioxide
Question 8
-
7/31/2019 Interactive Questions 08
34/53
Carbon dioxide does dissolve in rain to form a weak solution
of carbonic acid (H2CO3) but this is normal and does not
contribute to what is known as acid rain.
However, it is thought to be making the ocean more acid and
this is a cause for concern
No
-
7/31/2019 Interactive Questions 08
35/53
Carbon monoxide is a poisonous gas but does not
contribute to acid rain
No
-
7/31/2019 Interactive Questions 08
36/53
Oxides of nitrogen dissolve in rain water to form
nitric acid which is very harmful to lakes and land
plants
Yes
-
7/31/2019 Interactive Questions 08
37/53
Sulphur dioxide dissolves in water to form,
eventually, sulphuric acid. This damages lakes
and land plants
Yes
-
7/31/2019 Interactive Questions 08
38/53
Question 8
Acute shortage of oxygen in lakes and rivers is caused
by
(a) eutrophication
(b) the oxygen demand by the excess of
decaying plant material
(c) excess nitrate and phosphate
(d) excessive growth of algae
Question 9
-
7/31/2019 Interactive Questions 08
39/53
Eutrophication refers to a high level of nutrients in a body of
water. It may cause excessive algal growth but is not a direct
cause of oxygen depletion
No
-
7/31/2019 Interactive Questions 08
40/53
The oxygen demand of an excess of decomposing plant
material, e.g. algae, is the immediate cause of the
reduction in the oxygen content of the water in lakes and
rivers.
The excess of plant material is the result of eutrophication
Yes
-
7/31/2019 Interactive Questions 08
41/53
Eutrophication results from high levels of nitrate and
phosphate in the water. But although this encourages
excessive algal growth it does not inevitably lead tooxygen depletion.
No
-
7/31/2019 Interactive Questions 08
42/53
The excessive growth of algae is not itself a cause of
oxygen depletion.
No
-
7/31/2019 Interactive Questions 08
43/53
Question 9
Which of the following processes make no net contribution
of carbon dioxide to the Earths atmosphere?
(a) Growing crops
(b) Burning wood
(c) Burning coal
(d) Raising cattle
Question 10
-
7/31/2019 Interactive Questions 08
44/53
Yes
The growing crops are photosynthesising and removing
carbon dioxide from the atmosphere.
-
7/31/2019 Interactive Questions 08
45/53
Yes
The carbon in wood comes from the carbon dioxide absorbed
by the tree in the course of photosynthesis. When the wood is
burned, the amount of carbon dioxide released is the same asthat taken in by photosynthesis
-
7/31/2019 Interactive Questions 08
46/53
No
The carbon in coal comes from trees which were fossilized
about 300 million years ago. So the carbon dioxide released
from burning coal adds to the present day carbon dioxide in
the atmosphere
-
7/31/2019 Interactive Questions 08
47/53
No
Respiration in cattle produces carbon dioxide which is
added to the atmosphere
-
7/31/2019 Interactive Questions 08
48/53
Question 10
For the conservation of animals, the most important step
is
(a) reduction in the use of pesticides
(b) preservation of habitat
(c) suppression of hunting
(d) captive breeding programmes
-
7/31/2019 Interactive Questions 08
49/53
No
Reduction in the use of pesticides certainly helps to
conserve, for example, insect species and the
organisms which feed on them (e.g. birds) but it
affects only a limited range of animals
-
7/31/2019 Interactive Questions 08
50/53
Yes
This is the most important step. If an animals
habitat is destroyed, it is unlikely to survive
-
7/31/2019 Interactive Questions 08
51/53
No
Suppression of hunting helps to conserve a number of
species, such as the rhinoceros, but many animal
populations are not threatened by hunting
-
7/31/2019 Interactive Questions 08
52/53
No
Captive breeding may help conserve animals
threatened with extinction but if their habitat has been
destroyed they cannot usually be released
-
7/31/2019 Interactive Questions 08
53/53
End of questions
End show
Back to start