NABTEB 2019 BIOLOGY PRACTICAL VERIFIED ANSWER

*NABTEB-BIOLOGY-PRACTICAL-ANSWERS*

(1i)
Leguminous crops
(1ii)
(a) There is 5 lumbar vertebrae in Man
(b) There is 7 lumbar vertebrae in Rabbit
(1iii)
The last premolar in the lower jar and the first molar in the lower jar are large and modified to for carnassials teeth in Dog
(1iv)
– In cross fertilization and self fertilization
– In sexual and asexual reproduction
(1v)
Inferior Vena cana
(1vi)
Simple diffusion
(1vii)
– It must be moist
– It must have adequate supply of transport medium eg blood
– It must have large surface area to aid easy diffusion of gases
(1viii)
(a) Parallel venation
(b) Parallel venation
(1ix)
(a) Tubulinea
(b) Arachnida
(c) Liliopsida
(d) Magnoliopsida – dicotyledons
(1x)
– Supratidal or splash zone
– Benthic zone
(1xi)
mosses
(1xii)
It is the population divided by total land area or water volume, as appropriate.
(1xiii)
– Diabetic Mellitus
– Gall stone
– Cancer of the liver
– Infective Hepatitis
(1xiv)
– Thyroid hormones and calcitonin
– Testosterone
(1xv)
Brain
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(2i)
Specimen A is flamboyant/pride of Barbados
(2ii)
Diagram

Flamboyant flower diagram
(2iii)
Sepals :
– They enclose and protect the other floral part when the flower is in the bud stage
– They also attract insects, if green makes plant food
Petals: They attract insects which pollinate flower
(2iv)
A is the reproductive stri of flowering plant
(2v)
– Ovary : Inferior ovary
– Pistil : Monocarpus pistil
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(3i)
– Specimen B – Cassava
– Specimen C – cocoyam (corn)
– Specimen D – Carrot
(3ii)
– Cassava is propagated by cuttings
– Cocoyam is propagated by vegetative means
– Carrot is propagated from seeds
(3iii)
(a)
– E is terrestrial/aquatic habitat
– F is terrestrial habitat
(b)
– Possession of webbed back feet help them dig into the soil in cold temperature
– Possession of bulged eye for sure sight
(3iv)
– They both possess a pair of eyes
– They both possess shank
– They both have head
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(4i)
– Specimen G is boiled egg of a bird (fowl)
– Specimen H is scapula/shoulder blade of a small mammal
(4ii)
It is located on the upper part of the posterolacteral aspect of the thorax
(4iii)
Calcium and protein
(4iv)
Diagram

Draw a well labeled diagram of internal features of a boiled egg of a bird (fowl)
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(5i)
– Colour blindness
– Tongue rolling
– Body statue or shape
– Size of nose, head and ear
(5ii)
(a) Ecosystem is a basic functioning unit in nature. It is made up of living organisms (plants and animals) and their non-living environment
(b) Tropic level also called feeding level is defined as the feeding level or each stage in a food chain or food web
(c) Succession is defined as the process by which the structure of a biological community evolves over time.
(5iii)
(a) Green grass –> Grasshopper –> Toad –> Snake
(b) The biological implication of killing all available snakes in the environment is that, it results to population explosion in the prey species (ie toad)

Posted by admin on 15th May 2019.

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Categories: NABTEB