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100% Real Biology Obj and Essay Answer Waec Gce Available Here....
Author: Mr. Dan
Posted on: 04:35:05 Tue, 04 Sep 2018


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[9/4, 10:42 AM] Gurusfamily.Net: (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 carbohydraes
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
[9/4, 10:42 AM] Gurusfamily.Net: Q1(a)
1. Phylum Rhizopoda
2. Phylum Zoomastigina
3. Phylum Ciliophora
4. Phylum Sporozoa
5. Phylum Rhodophyta
6. Phylum Phaeophyta
7. Phylum Chlorophyta
Choose only five

Q1(a) ii
1. Phylum Rhizopoda - amoeba
2. Phylum Zoomastigina - trypanosome
3. Phylum Ciliophora - paramecium
4. Phylum Sporozoa - plasmodium
5. Phylum Rhodophyta - gracilaria
6. Phylum Phaeophyta - sargassum
7. Phylum Chlorophyta - chlorella

(b)


(c)
i. Vector is an organism that carries a disease from an infected organism to another
ii. Pathogen is a disease causing organism

(d) Copy the table as in the question
Cholera
Causative organism: Vibro cholerae

Mode of transmission: contaminated food and water

Symptom: diarrhoea

Malaria
Causative organism: plasmodium

Mode of transmission: bite of female anopheles mosquito

Symptom: abnormal high body temperature

Ring worm
Causative organism: fungi

Mode of transmission direct contact with infected person

Symptom:itching and hair breakage

Measles
Causative organism: virus
Mode of transmission: air droplet infection
Symptom:
Fever and running nose

Q1 (e)
1. Sleeping in treated mosquito net
2. Pouring oil on stagnant water to reduce the surface tension and deprive the larvae of oxygen supply
3. By using mosquito repellents and creams
4. By spraying rooms with short acting but effective insecticides
5. By disilting of chocked gutters
6. By covering of water containers and burying of empty cans
7. By introducing Tilapia's into water bodies to feed on the mosquito larvae

(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

5a

A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world.


A hypothesis is a proposed explanation for a phenomenon. For a hypothesis to be a scientific hypothesis, the scientific method requires that one can test it. ... Even though the words "hypothesis" and "theory" are often used synonymously, a scientific hypothesis is not the same as a scientific theory.

(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




[9/4, 10:44 AM] Gurusfamily.Net: 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
[9/4, 10:44 AM] Gurusfamily.Net: (Biology (Objective) 🔬*










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