Answers key
OBJECTIVE QUESTIONS
- C
- A
- B
- B
- C
- D
- C
- C
- B
- A
STRUCTURED QUESTIONS
1. (a) to
make the studying of organisms easier
and to facilitate international discussions.
b)
kingdom and example
Kingdom
|
Example
of organism
|
Animalia
|
Cat
|
Plantae
|
Balsam
plant
|
Fungi
|
Mushroom
|
Protista
|
Amoeba
|
Monera
|
Bacteria
|
C) (i)
I :
class
II : order
III : family
IV : genus
(ii) Periplanetta
americana
(iii) Linnaeus binomial system
d)
No. this is because a kingdom comprises
several phyla.
e)
A group of organisms which are capable of interbreeding to produce fertile
offsprings
2. (a) Apis mellifera : S
Pediculus
humanus : T
Chelifer pseudoncortionida : R
Julus
terrestris : Q
Astacus
torrentium :P
(b) The first part is the name of the
genus and the second part is the name of
the species.
(c)
These terms are based on personal opinions and therefore are subjective.
(d) *All of them have jointed legs
* All of them have exoskeletons made
of chitin.
ESSAY QUESTIONS
1
(a) Biodiversity is defined as the great variety of organisms on earth.
(b) The importance of biodiversity :
- provides various biological products
to humans and play important roles in
the economy (1)
- the
variety of species and ecosystems provide various environmental
services to humans as well as to
other species including pollination,
nutrient cycling, regulating of the
atmospheric composition and climate (1)
- All species are supported by the
interactions among other species and
their ecosystem for food, shelter and
other basic needs. (1)
- the diversity of plants and animals
means a diversity in genetic pool.
Genetic variation observed in the
different populations of plants and animal
species (1)
- (a)5 kingdoms : Monera, Protista, Fungi, Plantae, Animalia (5)
(b) characteristics of organisms
Monera
kingdom
|
Plantae
kingdom
|
-Unicellular
organisms (1)
-Absence
of nuclear membrane (1)
-Cell
wall present (1)
-Simple
organization(1 )
-No
tissue formation since the organisms are unicellular (1)
|
-Multicellular
plants (1)
-Cell
wall present (1)
-Chlorophyll
present (1)
-Most
of the organisms have tissues (1)
|
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