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NECO Biology Question and Answers

*NECO 2017 BIOLOGY QUESTIONS*

1i. Define homeostasis
ii. State two hormones found in plants
iii. Give two reasons why euglena is regarded as an animal and two reasons why it is regarded as plant

1bi. List two factors that affect transpiration.
ii. Draw a labelled diagram (8-10cm long) of the mammalian eye



2a.State the roles of the following in the digestion of food:
i. Beak
ii. Crop
iii. gizzard
iv. Liver


2bi. In a tabular form, give four differencs between arteries and veins
ii. List three diseases of the kidney
iii. Mention five functions of world health organization (WHO)


3a. Define the following terms..
i. Enzymes
ii. Cyclosis
iii. Peristalsis

3bi. List 3 game reserves in Nigeria
ii. State the dental formula of man

3ci. In a tabular form, state four differences between fruit and seed
ii. State functions of amniotic fluid


4a. Define the following terms
i. Decomposers
ii. Habitat
iii. Mutations

4bi.State three reasons for conservation of natural resources
ii. List three types of asexual reproduction
iii. Give five functions of blood to man
iv. Mention three differences between asexual and sexual reproduction





5a.Define the following terms
i. Primary successions
ii. Primary roots
iii. Macronutrient

5bi. List three diseases of the lungs
ii. Give four ways of controlling pathogens
iii. State three advantages  variation

5c. Describe the process of seed




NECO BIOLOGY SOLUTION

VERIFIED BIOLOGY OBJ
1-10: DADEAABCAA
11-20: ECEBBAADBC
21-30: BBABCAADAB
31-40: BACCCAAEDD
41-50: DABCABCAAE
51-60: ACEAEDEADB

                 

1a)
Homeostasis is the maintenance of a fairly constant internal environment despite the changes in the external environment. Eg Am Amoeba regulates the water content of its protoplasm inorder to keep it at a fairly constant level

1aii)
i)Auxins
ii)cytokinin

1aiii)
"Euglena " is regarded as an animal because
i)It feed on ready-made food
ii)It does not have a cellulose cell wall but has a plasma membrane
" Euglena " is regarded as an plant because
i)It has a chloroplast
ii)It can manufacture it's food

1bi)
Factors that affect transportations are
i)Temperature
ii)humility

1bii)
DRAW (8-10cm long) of the image (eye) given
NOTE:YOU MUST LABEL ONE SIDE ONLY
(coming as image)


2bi)_*Carbon dioxide:* With the increase of CO in air, rate of respiration decreases slightly.

*Temperature:* Below 20 C and above 45 C the rate of respiration reduces. The optimum temperature for respiration is 20 C – 45 C.

2bi)Difference Between Artery and Vein
Artery
1. Vessels which carry blood from the heart to various body parts
2. Arteries carry oxygenated blood from the heart except pulmonary artery
3. Arteries have thick elastic muscular walls
4. Valves are absent
5. Blood flows under high pressure
Vein
1. Vessels which carry blood from the various body parts to the heart
2. Veins carry deoxygenated blood from the various body parts except pulmonary vein
3. Veins have thin non elastic walls
4. Valves are present to prevent the backward flow of blood
5. Blood flows under low pressure

2bii)
-Adenovirus
-Nephritis
-Alagille
-Amyloidosis

3ai) Enzyme : Proteins that speeds up the rate of a chemical reaction in a living organism. An enzyme acts as catalyst for specific chemical reactions, converting a specific set of reactants (called substrates) into specific products. Without
enzymes , life as we know it would not exist.

II) cyclosis: the circulation of cytoplasm or cell
organelles, such as food vacuoles in some protozoans

III) peristalsis: the progressive wave of contraction and relaxation of a tubular muscular system, especially the alimentary canal, by which the contents are forced through the system.

3bii) The dental formula for different species are as follows where I = incisors, C = canines, P =
 and M = molars :
Man (adult)
I - 2/2 C - 1/1 P - 2/2 M - 3/3 = 16 x 2 = 32

3cii) Main Functions Of Amniotic Fluid
Provides Mechanical Protection : One of the main functions of amniotic fluid is to prevent mechanical trauma to the fetus. It keeps the growing fetus encased safely, acting as a shock absorber of sorts. Amniotic fluid provides a well-lubricated environment for the fetus to move around in, thereby helping in bone growth and strengthening.

Allows Development of Body Parts: Amniotic fluid circulates freely within the womb, keeping every part of the body lubricated. That allows for the growth of the external body parts such as fingers and toes and stops them from becoming clumped together. It also helps in the development of the lungs and the digestive system.

Offers A Natural Immune System : Amniotic fluid is a significant player in the baby’s natural immune system. Many of the antimicrobial substances that make up the natural immune system of the baby can be found in amniotic fluid. These antimicrobials protect the baby from various bacteria, fungi, protozoa, and viruses

*4ai)*
Decomposers are organism that break down complex organic molecules in dead plant and animal materials in stage, into simple organic molecules and finally into inorganic substances

*4aii)*
Habitat is a kind of place where an organism lives in nature

*4aiii)*
Mutation is a permanent change in DNA  structure that may alter or destroy a given character or give rise to a new character

*4bi)*
i)For torism
ii)For source of foreign exchange
iii)For source of energy

*4bii)*
i)Fission
ii)Budding
iii)Fragmentation

*4biii)*
Functions of blood
i)Transportation of digested food substance
ii)Transports oxygen
iii)Transports excretory products
iv)Distributes heat and equalizes body temperature
v)destroys bacteria through blood corpuscles

*4biv)*
TABULATE

*SEXUAL REPRODUCTION*
i)often two parents needed
ii)Gametes produced
iii)Offsprings show new variation

*ASEXUAL REPRODUCTION*
i)only one parent needed
ii)No gametes
iii)Offsprings identical



*5a)*
Primary succession is that which occurs in an area where no community existed before and involves the formation of new soil.it may begin from a bare dry environment or an aquatic environment

*5aii)*
Primary root is that which develop first and originates from the radicle of the seed of a plant. It is essential for the anchoring of the plant and ensure plant growth.it eventually develop into the tap root and fibrous root

*5aiii)*
Micronutrient is define as a class of chemical compound which is needed in largest amounts or quantities by organism. They are carbohydrates, protein and lipids

*5bi)*
i)Asthma
ii)lung cancer
iii)pneumonia

*5bii)*
i)Quarantining
ii)Prohibition
iii)Biological control
iv)chemical control

5biii)​
i)variation aids crime detection
ii)Variation enable and assist in blood transfusion
iii)variation help in determination of the paternity of a child

​5c)​
Seed germination
i)seed absorbs water and swell
ii)testa splits
iii)radicle appear and grows download into the soil
iv)plumule appears and grows upwards through the soil until it reaches the surface.


Keep refreshing....

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