BIOLOGY-PRACTICAL-ANSWERS

(1a)
A–Hygrometer
B–Anemometer
C–Light meter
D–Rain gvage
E–Wind vane

(1aii)
A–it is used to measure relative humidity.
B–it is used to measure the speed of wind.
C–it is used to measure light intensity on land
D–it is used to measure the amount of rainfall
E–it is used to measure the direction of of wind.

(1b)
TABULATE:
UNDER I:
Example | Description | Use of beak
UNDER F:
Eagle | the beak is short and cause to enable tear prey | it is used to hold prey firmly, it use to tag prey
UNDER G:
Cock | it is short and little curve | it is used to peck the food
UNDER H:
Duck | it is long and flat | it enable animal to sieve the food

(1c)
(I) photosynthesis
(II) photosynthesis is defined as the process by which green plants manufactur their food making use of Co2 and water in the a presence of sunlight

1civ)
Blowing splint

(1cv)
It is a controlled experiment

(1cvi)
An experiment to show that CO2 is absorbed while is giving out

(1cvii)
(i) Avoidance of presence of sunlight
(ii) Avoidance of photosynthesis in terms of increment

(1cviii)
From the green leaves

(1cx)
Oxygen

(2ai)
I. Glass tube – Wind pipe
II. Bell jar – Chest gravity
III. Y tube – Bronchi
IV. Balloons – Lungs
V. Rubber sheets Diaphpram

(2aii)
Inhalation

(2aiii)
Inhalation is the process of breathing in of air(oxygen) into the respiratory organs such as lungs or gills

(2aiv)
Exhalation

(2av)
Exhalation is the flow of the breath out of an organism

(2bi)
The head region of fish show the gills.

(2bii)
I – Nostril
II – Eye
III – Gill
IV – Scale
V – Fin

(2biii)
For gaseous exchange

(2ci)
O – Grasshopper
P – Spider

(2cii)
O – insecta
P – arachnida

(2ciii)
In a tabular form:
Differences between O and P:
1. Possession of compound eyes.
2. Possession of six legs
3. Possession of three body segments.

1. Possession of simple eye.
2. Possession of eight legs.
3. Possession of two body segments.

(3ai)
Q => Chtomdomena monoica
R => Euglena viridis
S => Amoeba preteus
T => Paramecium caudatus

(3aii)
I => flagellum
II => Pyrenoid
III => Eyespot
IV => Chloroplasts
V = Nucleus
VI => Meganucleus
VII = Contractive Vacuole
3aiii)
Q – flagella
R – flagella
S – Pseudopodia
T – Cilia
3iv)
I ) flagellum – A long, mobile filament that the Euglena uses to propel itself in its environment
II) Pyrenoid – act as centres of carbon dioxide (CO ) fixation, by generating and maintaining a CO rich environment around the photosynthetic enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO).
III)- Stigma – A light sensitive-spot that allows the Euglena to detect light, so that it may move towards it in order to conduct photosynthesis
IV)- chloroplast – Organelle that allows the organism to conduct photosynthesis

3v)
three similries between Q and R are:-
– Possession of flagellum
– possession of eye spot
– possession of nucleus

3vi)
The three difference between S and T are

Under S:-
– S is shapeless
– absence of cilia
– possession of pseudopodia

Under T:-
– T is slopper in shape
– possession of cilia
– Absence of pseudopodia

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