(a)(i) What is an ecological niche? (i) State five roles played by a mango tree...
(a)(i) What is an ecological niche?
(i) State five roles played by a mango tree in its ecological niche.
(b)i) State two reasons why ecologists use sampling techniques in population studies.
(i) State four examples of sampling techniques used in population studies.
(c)Name four types of fingerprints in humans.
(d)) Name the plant used by Gregor Mendel in his experiment.
(ii) State two reasons why the plant named in 3(d) was used.
Explanation
a [i]Ecological niche
where and organism lives and the role it plays in an ecosystem/community.
[ii] Roles of a mango tree in its ecological niche
i. absorbs water/mineral salts from the soil organism normally lives; and the
ii.absorbs sunlight for photosynthesis
ii.provides shelter for animals/other plants
IV.acts as support for creepers
V. produces fruits/food/serves as food
Vi. serves as fuel source for animals vii. covers the ground with dead leaves that enrich the soil
b[ i] Counting individuals could be impossible/difficult in fast moving animals
ii. Counting individuals could be tedious ii. Counting individuals could be time consuming/use of technique saves time
iv. The terrian/habitat could be difficult to reach
[ii] i. Quadrat method ii Random sampling method
ii.Sweep net method iv cluster sampling
V. Pitfall trap method vi. Line transect method
Vili.Light trap method ix. Stratified sampling
X. Tullgren funnel method xi. Convenience sampling
xii systematic sampling method
[c]i .Arch/tented arch ii compound
iii loops/double/central pocket/ulna radial loop
iv.whorls/accident/plain whorl
[d]i Pea plant/Garden pea plant/Pisum sativum.
ii a it is self-pollinated/flowers are bisexual
b has short life cycle
c produces many offspring in one cross
d presence of distinct physical characters that are easily recognisable.
b.Has a short life cycle
c.produces many offspring in one cross
d.presence of distinct physical characters that are easily recognisable