WAEC GCE 2018 BIOLOGY OBJECTIVE,OBJ AND THEORY ANSWER – NOV/DEC EXPO

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Biology GCE answers

(Q1 a)

I) phylum euglenophyta, phylum rhodophyta, phylum ciliophyta, phylum zoomastigophyta, phylum sporozoa

II)phylum euglenophyta......euglena

Phylum rhodophyta..........plumaria

Phylum ciliophyta..........paramecium 

Phylum zoomastigophyta......Giardia

Phylum sporozoa...........plasmodium 

(b)

I) A vector are organisms or agents for the transfer of microorganisms from one host to another 

II) Pathogen is a disease-causing organism 

(c) 

Cholera....bacteria......drinking contaminated water.....vomiting 

Malaria....Plasmodium sp.....Bite by female anopheles mosquito....Headache

Ringworm....parasitic fungi....skin contact with infected person......red patch on skin

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(2a)

Vitamins are group of organic compounds which are essential for normal growth and nutrition and are required in small quantities in the diet because they cannot be synthesized by the body.

(2b)

Vitamin: C

One Function: Healing of wounds

One Deficiency: Scurvy

One Source: Citrus Fruits

Vitamin: D

One Function:  Strong bones and teeth

One Deficiency: Rickets

One Source: Eggs

Vitamin: B

One Function: Releases energy from cabohydraes 

One Deficiency: Beri-beri

One Source: Yeast

Vitamin: K

One Function: Clotting of blood 

One Deficiency: Failure of blood to clot

One Source: Milk

(2c)

(i) Iron: Assists in nitrate and sulfate reduction and energy production within the plant

(ii) Nitrogen: For rapid growth

(iii) Calcium: It is responsible for holding together the cell walls of plants

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3a) 

1) Food chain

Mango trees Caterpillars->

Producer) (Primary consumer)

-chicks of foul thank

secondary consumer) (Tertiary Consumer)

ii)Pyramid of numbers

Hawks 1o

chicks 30

Caterpillars 80

Mango trees 50

b) Benefits of

1) Water

- it serves as a medium of transportion

- it is useful for agricultural purposes eg earthworm

- it provides employment for people

ii) Soil

- it is the home of some organisms

- it the source of some mineral

resources

iii) Forest

-it supports forest and wildlife

- they are sources of raw materials

- They are sources of timber for

for Industries eg collon, nibber

- They provide medicinal herbs

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6a)

i)flexible dujardin

ii)robert hooke

iii)mathiahs von virckow

6b)

TABULATE

classes of plant bases of life cycle and example

i)annual - maize, rice

ii)biennial - carrot, ginger

iii)perenial - banana, cocoa

6c)

The amniotic fluid help on neutralize the effect of changes external temperature

6d)

i)Rhizobium- fixes atmospheric nitrogen directly into the plant

ii)Azotobacter- fixes atmospheric nitrogen into the soil either aerobically anaerobically

iii)Blue Green- improve soil fertilizer

6e)

Click HERE for The Diagram

BIOLOGY ANSWERS LOADING