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2016 Biology Neco Expo / Biology Obj And Essay Answers

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1ai) Morphological variation refers to the noticeable physical
appearance of individual of the same species . for example
in human beings morphological variation include, height of
the body , shape of the body etc
1aii ) pollination can be define as the transfer of pollen
grains from the another to the stigma of a plant
1iii ) niche : is a term that is used in ecological biology to
define an organism' s
role in an ecosystem .
1bii )
1. Both processes release energy
2. Both start with the breakdown of a nutrient ( glucose )
3. Both yield byproducts
1c) Ecological Niche refers to the specific portion of a
habitat which is occupied by a particular species or
organism
1ci)
----- Pterophyta
------ Anthophyta
------- Bryophyta
1cii)
---Embryo with two cotyledons
----- Flower parts in multiples of four
or five
---- Roots develop from radicle
---- Pollen with three furrows or
pores
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2a)
DRAW THE DIAGRAM
2bi)
-They have two pairs of libs
-They have naked or moist and glandular skin with no external scales
-They carry out gaseous by gills,lungs,skin and mouth
-Reproduction is sexual
-They have poisonous gland for defence
-They have three chambered heart
2bii)
-Flowers are dull coloured
-Absence of scent
-Flower have small,incouspicious petals/sepals
-Pollen grain are small smooth light and not sticky
2biii)
-Possession of succullent stems by desect plant to enable them store excess water
-Possession of tiny and scanty leaves to reduce water loss through transpiration
-Possession of extensive root system for anchorage water absortion

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