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2023 WAEC Biology Theory a.Relationships I, II, III, IV and V exist among some organisms in an ecosystem. Use...

Biology
WAEC 2023

a.Relationships I, II, III, IV and V exist among some organisms in an ecosystem. Use them to answer the question
I: Organism A grows on dead organism B.
II: Organism C feeds on the remnants of food left by organism D without affecting organism D negatively or positively
III: Organism E provides shelter for organism F while organism F transports organism E towards food
IV: Organism G kills organism B for food
V: Organism H feeds on organism J, causing organism J a disease.

Name the type of relationship in: I,II,III,IV,V

b. what is the biological term for each of organisms B and G?

c. Name one example each of organisms B to J

di.  Name the relationship that is most beneficial to the ecosystem.

ii Give one reason for the answer in 3d(i)

ei. Give two examples of organism A

ii. Name the group to which organism A belongs

 

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Explanation

(3a)

I: Saprophytism
II: Commensalism
III: Mutualism
IV: Predation
V: Parasitism

(b).

B- Prey, G- Predator

(c).

B: Antelope/goat/sheep/cow/rabbit/guinea pig/rat/
C: Remora fish
D: Shark
E: Hermit crab
F: Sea anemone
G: Lion/tiger/leopard/cat/dog/snake/hawk/eagle/
H: Tapeworm/tick/louse/Plasmodium
I: Ascaris
J: Human/pig/cattle/cow/sheep/dog/cat

(di). Saprophytism

(ii). It is involved in nutrient recycling/replenishment of nutrients in the ecosystem.

(ei). -Mushroom/Mucor/Rhizopus/Yeast;
-Pseudomonas/Bacillus/Clotridium/Enterobacter|Escherichia spp./E.coli/Salmonella spp

(ii). Fungi/Bacteria/mold/mould


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WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts