a i
i- free living
ii - As filament
iii - As colony
=======
1ai)
i- free living
ii - As filament
iii - As colony
1aii)
i- Amoeba
ii - spirogyre
iii -volvox
1b.) Diagram
1c i)
Plant cells
* has chloroplast
* has a large vacoule
*has a cell centrioles
* has definities shape
Animal cell
* has no cloroplast
* has a small vacoule
*has centrioles
* has no definite shape
(2a)
Mouth,Oesophagus,Stomach,Duodenum,Small
intestine,Caecum,Appendix,Large
intestine,Rectum,Anus
(2bi)
TABULATE
Alimentary canal of birds|
Alimentary canal of man
-There is presence of crop|
Crop absent
-There is presence of
proventiculus|Proventiculus
absent
-There is presence of gizzard|
Gizzard is absent
(2bii)
-Both have caecum
-Both have Oesophagus
-Both have duodenum
(2c)
Herbivore posses heterodant
type of dentition in which they
posses teeth of different
shapes and sizes.Herbivores
feed mainly on vegetable
hence its teeth is 28 in
numbers.Its incisors are flat
with sharp cutting edges for
cutting vegetables or grasses
.canine is absent.the space
creates due to absense of the
canine is called diastema.
Diastema allows manipulation
of grasses in the mouth.It has
a very large molar and
premolar closely packed and
have very large ridged surface
area for cutting and grinding
2d)
-They help in regulation of
blood sugar by producing
insuling and glucagon
-They help in digestion
3ai)
A habitat is an ecological or
environmental area that is
inhabited by a particular
species of animal, plant, or
other type of organism.
The term typically refers to
the zone in which the
organism lives and where it
can find food, shelter,
protection and mates for
reproduction, utilizing the
qualities the species has
adapted to survive within the
ecology of the habitat. It is
the natural environment in
which an organism lives, or
the physical environment that
surrounds a species
population.
A habitat is made up of
physical factors such as soil,
moisture, range of
temperature, and availability
of light as well as biotic
factors such as the availability
of food and the presence of
predators.
A habitat is not necessarily a
geographic area—for a
parasitic organism it is the
body of its host, part of the
host's body such as the
digestive tract, or a cell within
the host's body.
=========OR===========
(3ai)
A habitat comprises of an
organism immediate
environment or where it lives
or resides
(3aii)
-They help in the decay of the
organisms
-They also help to return
certain substances like gases
eg Nitrogen to the atmosphere
thereby regulating certain
biological processes such as
the Nitrogen cycle,carbon
cycle
-Some of the substances
released are important in
processes such as
respiration,photosynthesis
(3b)
Energy flows basically from
the producers in a fresh water
habitat to the consumers.The
producers usually are
phytoplanktons which are
taken up by the primary
consumers usually small
fishes.
The primary consumer are
taken up by the secondary
consumers which are larger
fishes such as sharks.This
sharks may inturn be taken up
by man which is the tertiary
consumer
SCHEMATIC DIAGRAM
Phytoplanktons->Small fishes-
>Sharks->Man
(3c)
-They causes diseases such as
rice smut,black pod of cocoa
which may lead to waste
-They also reduce the
economic value of plants
leading to financial loss
(3cii)
-They help in fermentation of
certain substances like
yughourt eg lactobacillus
species
-They help in decomposition
and decay of substances eg
sprophytic micro organism
-They causes diseases eg
smallpox and chicken pox
hence have been useful tools
in the development of
antibiotics and vaccines
-They are useful in certain
biological processes eg
photosynthesis
-They are used in sewage
treatment
-Sources of enzymes
