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TESO SOUTH DISTRICT JOINT EVALUATION TEST – 2012
231/1
BIOLOGY
Paper 1
(THEORY)
MARKING SCHEME
1.
Nitrogen Rej. Nitrates, Amino acids
2.
Vitamin K
mks)
3.
(i)
(ii)
Liver
Kidney
(2 mks)
4.
(a)
(b)
Incisor tooth
Chisel shaped for cutting;
(2 mks)
5.
(i)
mks)
Gives evidence on the types of organisms that existed
(ii)
(1 mk)
Rej. Calcium only.
(2
(2
long time ago and shows morphological changes that have occurred.
Gives evidence based on morphological resemblance between embryos of different
vertebrates species during early stages of development.
6.
(i)
Dry deliscent have dry pericarp that splits along one or more lines of weakness to release
seeds.
(2 mks)
(ii)
Dry indeliscent have dry pericarp which do not split to release seeds.
(2 mks)
7.
(i)
(ii)
8.
9.
(a)
mks)
(b)
(c)
(a)
Coordinates body movements and body balance.
Thermoregulation.
Ulna
(2 mks)
(3
Hinge joint
Humerus bone
(b)
Meiosis
Prophase I
Causes variation (genetic variation)
10.
(a)
(b)
Albinism, sickle cell anaemia, Haemophilia; colour blindness
Down’s syndrome; Turner’s syndrome; klinefelters syndrome;
11.
(a)
(b)
Golgi body
Processing / packaging glycoprotein; secretion / transport of package material; production
of lysosome;
12.
(a)
mks)
(b)
13.
14.
K – Root hair cell
L – Endodermis
Elongated to increase area for absorption of water and mineral salts
(a)
To show oxygen is necessary for germination and respiration.
germination occurred
B – Germination occurred.
(c)
Water (i)
Softens the testa
(ii)
Activates the germination enzymes
(iii) Dissolves the store food / hydrolyze stored food.
mks)
(a)
mk)
(i)
(ii)
15.
(i)
(ii)
16.
(a)
(2
(b)
A – No
(any 2
L
Energy decreases up to the feeding / trophic level.
(1
(2 mks)
Ecology – Study of inter relationships between organisms and their environment.
Anatomy – Study of structures of living things.
-
(b)
Have thin walls
Have dense cytoplasm
Have
no vacuole
Have prominent
nucleus.
Cambium / cork cambium / vascular cambium.
17
(a)
(b)
Produce / secreates mucus
Keeps the
(i)
trachea open / strengthens the trachea.
18.
(a)
(b)
Positive phototropism.
Unilateral light causes auxin to diffuse / migrate to the dark side; high concentration of
auxin on the dark side stimulates more cell Elongation / growth.
19.
(a)
(b)
Anti diuretic hormone / Vasopressin
Diabetis insipidus
20
-
Number of body parts.
Number of legs
21.
(i)
(ii)
aerenchyma
Epidermis
22.
(a)
hypotonic solution
(b)
The cortex cells absorbed water by osmosis and the cells became turgid hence larger; the
epidermis is impermeable to water molecules.
23.
(a)
(b)
Carbon (iv)
Stroma.
24.
(a)
-
(b)
Larva and adult exploit different food nucleus hence less competition.
The pupa storage is non – feeding hence the organism can survive under
adverse conditions.
Ecdysom
25.
(a)
(i)
(ii)
(iii)
(iv)
26.
(a)
-
(b)
27.
(a)
(b)
28.
(a)
29.
oxide fixation
Temporary storage of food
Secretes digestive enzyme
Secretes mucus
- gastric juice
Secretes Hcl
- Endocrine function i.e. Gastrine hormone
Stimulates milk secretion
Initiates labour / contraction endometrium
Ovulation
Stimulates production progesterone hormone
Inhibit production of oestrogen.
Transpiration/ Rate of transpiration
The upper side has more stomata than the lower side which increase SA for evaporation.
CO Pr oduced 2
(i)
RQ
=
CO2 Pr oduced
9.2
=
9
=
1
(ii)
Carbohydrates
(iii) Cytoplasm
(a)
Ability of the body to maintain a steady internal environment
(b)
(i)
Thermoregulation
(ii) Osmoregulation
(iii) Sugar
regulal (iv) Ionic balance.