Waec 2019 Biology Theory and Obj Answers – May/June Expo

Waec 2019 Biology Theory and Obj Answers – May/June Expo


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NIGERIA

**2019 WAEC ~ May/June ~ Biology (Objective)*

*01 - 10 :* CBABBACABC

*11 - 20 :* CDBCACDDBB

*21 - 30 :* DCCDDBCADB

*31 - 40 :* DBADDAACDC

*41 - 50 :* CCADDCAADC

Bye🤭

(No6i)
Lightning. 1. A discharge of atmospheric electricity, accompanied by a vivid flash of light, commonly from one cloud to another, sometimes from a cloud to the earth. The sound produced by the electricity in passing rapidly through the atmosphere constitutes thunder.
(6ii)Nitrosomonas  A genus of gram-negative, ellipsoidal or rod-shaped bacteria whose major source of energy and reducing power is from the oxidation of ammonia to nitrite. Its species occur in soils, oceans, lakes, rivers, and sewage disposal systems
6iii.


Azotobacter is a genus of usually motile, oval or spherical bacteria that form thick-walled cysts and may produce large quantities of capsular slime

*3c*

i) Saprophytes are plants, fungi, and microorganisms that feed on dead or decaying matter (or, in more current and specific usage, they feed on the fungi that feed on the decaying material).

ii) examples are
----> molds
----> ghost plant or Indian pipe
---->mushrooms
---->gnome plant.


Biology answer

No 1

Tadpoles------ Gills

Cockroaches-- spiracles, trachea .

Domestic fowl.....lungs

Talinum.......Stomata

Earthworm ......Diffusion through skin

Amoeba ..... Cell membrane

Biology answer

No 1

Tadpoles------ Gills

Cockroaches-- spiracles, trachea .

Domestic fowl.....lungs

Talinum.......Stomata

Earthworm ......Diffusion through skin

Amoeba ..... Cell membrane
 1ai)

Sexual reproduction:This is a type of reproduction which involves the fussion of male gametes(eg sperm cell) and the female gametes(eg egg cell) to form zygote which later develops to a young offspring

1aii)

-Abstinence

-Birth Control Sponge (Today Sponge)

-Birth Control Vaginal Ring (NuvaRing)

-Birth Control Shot (Depo-Provera)

-Birth Control Implant (Implanon and Nexplanon)

1aiii)

-Mutualism represents a symbiotic relationship where both species involved benefit from the relationship while commensalism represents a symbiotic relationship where only one organism benefits while the other does not benefit from the relationship

-Good examples for mutualism include the relationship between bees and flowers as well as humans and digestive bacteria while Examples for commensalism include hermit crabs using dead gastropods for shelter or millipedes travelling on birds

1b)

i)Hooks and suckers allow it to hold on tightly to the wall of the intestine

ii)Its flat body gives it a large surface area to absorb food

iii)It has no need of a mouth or gut as it absorbs already digested food

1ci) See the diagram.
(No6i)
Lightning. 1. A discharge of atmospheric electricity, accompanied by a vivid flash of light, commonly from one cloud to another, sometimes from a cloud to the earth. The sound produced by the electricity in passing rapidly through the atmosphere constitutes thunder.
(6ii)Nitrosomonas  A genus of gram-negative, ellipsoidal or rod-shaped bacteria whose major source of energy and reducing power is from the oxidation of ammonia to nitrite. Its species occur in soils, oceans, lakes, rivers, and sewage disposal systems
B-A TEAM
(6iii)Azotobacter is a genus of usually motile, oval or spherical bacteria that form thick-walled cysts and may produce large quantities of capsular slime.
3c

i)  Saprophytes are plants, fungi, and microorganisms that feed on dead or decaying matter (or, in more current and specific usage, they feed on the fungi that feed on the decaying material).

ii) examples are
----> molds
----> ghost plant or Indian pipe
---->mushrooms
---->gnome plant.

*CONTINUATION NO1*

*1ai* )
Sexual reproduction:This is a type of reproduction which involves the fussion of male gametes(eg sperm cell) and the female gametes(eg egg cell) to form zygote which later develops to a young offspring

 *1aii* )

-Abstinence

-Birth Control Sponge (Today Sponge)

-Birth Control Vaginal Ring (NuvaRing)

-Birth Control Shot (Depo-Provera)

-Birth Control Implant (Implanon and Nexplanon)

 *1aiii* )

-Mutualism represents a symbiotic relationship where both species involved benefit from the relationship while commensalism represents a symbiotic relationship where only one organism benefits while the other does not benefit from the relationship

-Good examples for mutualism include the relationship between bees and flowers as well as humans and digestive bacteria while Examples for commensalism include hermit crabs using dead gastropods for shelter or millipedes travelling on birds

 *1b* )

i)Hooks and suckers allow it to hold on tightly to the wall of the intestine

ii)Its flat body gives it a large surface area to absorb food

iii)It has no need of a mouth or gut as it absorbs already digested food

 *1ci* ) See the diagram.




( *6iii* )
Azotobacter is a genus of usually motile, oval or spherical bacteria that form thick-walled cysts and may produce large quantities of capsular slime.*1ai* )
Sexual reproduction:This is a type of reproduction which involves the fussion of male gametes(eg sperm cell) and the female gametes(eg egg cell) to form zygote which later develops to a young offspring

 *1aii* )

-Abstinence

-Birth Control Sponge (Today Sponge)

-Birth Control Vaginal Ring (NuvaRing)

-Birth Control Shot (Depo-Provera)

-Birth Control Implant (Implanon and Nexplanon)

 *1aiii* )

-Mutualism represents a symbiotic relationship where both species involved benefit from the relationship while commensalism represents a symbiotic relationship where only one organism benefits while the other does not benefit from the relationship

-Good examples for mutualism include the relationship between bees and flowers as well as humans and digestive bacteria while Examples for commensalism include hermit crabs using dead gastropods for shelter or millipedes travelling on birds

 *1b* )

i)Hooks and suckers allow it to hold on tightly to the wall of the intestine

ii)Its flat body gives it a large surface area to absorb food

iii)It has no need of a mouth or gut as it absorbs already digested food

 *1ci* ) See the diagram.




( *6iii* )
Azotobacter is a genus of usually motile, oval or spherical bacteria that form thick-walled cysts and may produce large quantities of capsular slime.


NIGERIA✅

3a) tabular form
Parasitism=
Cattle and white fgret
Tapworm in the gut of human

Mutualism=
Lachea
Flowers and honey bees..

Commensalism=
Mistletoe and cacao plant.
ramorant plant

*3c*

i) Saprophytes are plants, fungi, and microorganisms that feed on dead or decaying matter (or, in more current and specific usage, they feed on the fungi that feed on the decaying material).

ii) examples are
----> molds
----> ghost plant or Indian pipe
---->mushrooms
---->gnome plant.

*Q2ai* . Enzymes are substances produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.

ii.
1. Speed up chemical reactions.
2. Required in minute amount.
3. Highly specific in their action
4. Affected by pH
5. Affected by temperature

(2a)
(i) Meat type A and meat type D
(ii) they contain the lowest fat content
(2bi)
(i)Meat type C and meat type D
(ii)
- Proteins gives energy
-  Strengthens muscle
(2ci)
(i) A, C & D
(ii) A person deficient in protein suffers kwashiokor. Hence a diet with high content in protein is needed.
(2di)
Meat type D
ii) Meat type F
(2e)
carbohydrates
(2f)
- For energy and heat to keep the body warm
- Are used as insulators to nerves and cell membranes
- Formation of cell membranes
(2g)
Drop the meat on a white paper observe the meat against a source of light, the far part becomes more translucent

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GEOGRAPHY PRACTICAL STUDY TOPICS STUDY THEM ALL

GEOGRAPHY PRACTICAL STUDY TOPICS STUDY THEM ALL

GEOGRAPHY PRACTICAL STUDY TOPICS STUDY THEM ALL



*MAP READING*:Go through this topics, *map scale*, *map copying*, *drainage* *pattern*, *direction and bearing*, *major relief Features*, *measurement of distance on map extract*





*The Theory Part Of The Geography Practical*✅✅✅



¶Solar system
¶Earth as a planet
¶latitude and longitude
¶rocks
¶weather and 
climate, 
¶soils, environmental ¶resources, transportation, 
¶settlement, 
¶manufacturing industry, ¶trade, 
¶agriculture, 
¶population, 
¶ecowas

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Waec 2019 Geography 3 Practical and Physical Geography

Waec 2019 Geography 3 Practical and Physical Geography 


Wednesday,
24th April, 2019 ✔✔
Waec 2019 Geography 3 (Practical and Physical Geography) ✔
2:00 pm – 3:50 pm✔


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Geography practical



Geography 3(Practical and Physical Geography) – 2:00 p.m. – 3:50 p.m.
++++++++++++++++++++++++++++++++++++

=============================

KEEP REFRESHING THIS PAGE
2019 WAEC: Geography ANSWERS BY Mr Fun 07066670798 …

We are successfully done with geography without stress

Mission accomplished

ESSAY ========>
++++++++++++++++++++

(1a)
Drawing

(1bi)
(i) The relief is made up of mainly lowland.
(ii) The highland is in the north west of the map.
(iii) The rivers flow from North to South.

(1bii)
(i) The rivers take their sources mainly from the north East Highland.
(ii) The drainage pattern is trellised.
(iii) The nature of the rock is homogeneous.

(1c)
(i) Trading
(ii) Fishing

(2a)

Note: Students should use their compass to draw the circles

(2b)

(1)Difficult to calculate actual value (if not shown).

(2)Inaccurate perception of symbol size

(3)Do not easily

reveal exact values.

(4) Can be easily manipulated to yield false impression

===============Copied From Funloaded==============

(3a)

Mode of formation: Chemically formed sedimentary rock are formed when chemical sediments accumulates over a long period of time. These sediments then combine and undergo further processes to form rock.

(3b)

(i) Limestone

(ii) Chalk

(iii) Barite

(3c)

(i) They serve as a source of minerals such as halite ie common salt.

(ii) They produce limestone used in producing cement.

(iii) They houses fossil records.

(iv) They help in housing coral reefs which serves as tourist attraction

===============Copied From Funloaded==============

(4a)

A lake is a land-locked body of slow-flowing water

(4b)

WIND EROSION LAKES: These are lakes formed where wind deflation erode and result into formation of depression in desert. If such depressions are small and shallow pan lakes may form. But sometimes such depression goes deeper to expose water table and result into formation of Oasis lakes like in Qattara Depression in Egypt.

(4c)

(i) It provides water and food for human use

(ii) It helps in water pollination purification to support ecosystems

(iii) Serves as tourist center

===============Copied From Funloaded==============

(5ai)

(i)each time zone differ by 15degree in longitude

(ii)the reference point is the G.M.T

(iii)it divided within 24 time zone

(iv)it maintain the eential time for time zone in which they are

(5aii)

(i)data change by 24hours when it is crossed

(ii)the 180degree meridian represent for the original of a date line

(iii)travelers going to the east gains one day which does going to the west losses one day

(iv)it is not a straight line

(5b)

Time difference =1800 – 900

=900hrs

=9hours

Longitude = 9*15=135degree

==============Copied From Funloaded==============

(7a)

Draw the diagram of rain gauge

(7bi)

Procedure

Remove the jar’s label.

Attach the ruler to the outside of the jar with the rubber band; make sure that the bottom edge of the ruler is even with the bottom of the jar. Or secure the ruler inside the jar so it is standing vertically with the end at the base of the jar/bottle. Tape the ruler in place so the numbers can be read from the outside of the jar/bottle.

Note: As an alternative to a ruler, you can use a permanent marker to mark the inches/centimeters on clear tape affixed vertically to the outside of the jar/bottle beginning at the base to the outside of the jar/bottle. Cover the marks with a second piece of clear waterproof tape.

Place the funnel in the top of the jar. The top end of the funnel should cover the entire mouth of the jar.

If you would like, you can practice filling the jar with water and measuring the total amount.

(7bii)Precautions taken while measuring rainfall… i.e. installing a rainguage are..

It should not be totally inserted inside the ground…and..

IT should be kept away from tress and building to avoid collection of extra water

(7c)By summing up all the monthly records for the whole year

=============Copied From Funloaded==============

(8a) Food chain is the series of processes by which food is grown or produced, sold, and eventually consumed.

(8b)Ecosystems maintain themselves by cycling energy and nutrients obtained from external sources. At the first trophic level, primary producers (plants, algae, and some bacteria) use solar energy to produce organic plant material through photosynthesis. Herbivores—animals that feed solely on plants—make up the second trophic level. Predators that eat herbivores comprise the third trophic level; if larger predators are present, they represent still higher trophic levels. Organisms that feed atseveral trophic levels (for example, grizzly bears that eat berries and salmon) are classified at the highest of the trophic levels at which they feed. Decomposers, which include bacteria, fungi, molds, worms, and insects, break down wastes and dead organisms and return nutrients to the soil.



*Note:the instruction says Answer question 1 and Any other 3✔✔*

(1a)
Picture loading.. 
(1bi)
(i)generally the place is low lying area
(ii)this is a ridge that is the shai hills in the northern part of the map ranging from 250ft to 90ft
(iii)the general area is underlying and almost flat 
(1bii)
(i)The river exhibit dendritic pattern 
(ii)river dekyider is demanded around the salt pond
(iii)river ohudor flows towards the south





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Waec 2019 Data Processing Obj & Essay Answer

: Waec 2019 Data Processing Obj & Essay Answer 


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REFRESH PAGE
AROOOSTUFF - 23rd, April 2019
==> Waec 2019 Data Processing Obj & Essay Answers

===================================


WAEC DATA PROCESSING 

Data-Obj
1DCBABDBBDB
11CACCADCCBA
21BBBBAADCAC
31CCDABAADBB
=====

THEORY ANSWERS

(1a)
Teleconferencing is the use of telecommunication devices to hold discussions between participants in different locations.

(1b)
(i) For cash withdrawals
(ii) For deposits
(iii) For transfer of funds

(1ci)
Modem transmits digital data over communication lines. The conversion of the signals to/from analog to digital is the main purpose of a modem.

(1cii)
(i) Electronic Mails
(ii) Telephone messages

=======================================

(3a)
(i) They might have been experiencing difficulties in resource Sharing

(ii) They might have lost some crucial data, so they want to connect it for Data Protection and Redundancy

(iii) Ease of Administration
(iv) To maintain complex internal communications systems

(3b)
(i) Modem
(ii) Network Router
(iii) Network Hub
(iv) Network Switch


(3c)
(i) Modem - It modulates and demodulates the signal between the digital data of a computer and the analog signal of a telephone line.
(ii) Network Router - This is responsible for routing traffic from one to another network. 
(iii) Network Hub - This is used to connect multiple network hosts also for data transfer.
(iv) Network Switch - It helps in filter and forwarding of data

=======================================

(4ai)
Entities: are usually recognizable concepts, either concrete or abstract, such as person, places, things, or events which have relevance to the database

(4aii)
Attribute: refers to a database component, such a table. It also may refer to a database field. In other words Attributes describe the instances in the row of a database.

(4aiii)
Relationships is a common type of database whose data is stored in tables.

(4bi)
Cardinality refers to the uniqueness of data values contained in a column. In other words High cardinality means that the column contains a large percentage of totally unique values and Low cardinality means that the column contains a lot of “repeats” in its data range.

(4bii)
(i)one-to-one (1:1)
(ii)one-to-many (1:M)
(iii)many-to-many (M:N)

=====================================

(5ai) 
CD-ROM

(5aii)
I - CD-ROM technology 
II - It switch on the CPU 
III - Carefully store in a cool dry place. 

(5b) 
P - It displays video and graphical information generated by the computers graphics adapter allowing the user to interact with the computer. 
Q - It carries out the instructions of a computer program. 
R - It is used to position a cursor on a computer screen. 
S - It is used to input characters and functions in the computer system by pressing button or keys. 
T - It converts digital signals generated by the computer into analog signals which can be transmitted over a telephone or cable line and transforms incoming analog signals into their digital equivalent. 

(5c)
(i) Click on your workspace while still holding down your mouse button drag to draw your shape and release button when done

=====================================

6ai)
drop cap
6aii)
i)type the first word or sentence
ii)highlight the first character
iii)click on drop cap from insert menu

6aiii)
a)click enter after the second paragraph
b)click on colums from page layout on menu bar
c)click on two colums from more colums option
d)mark on line between box select from this point forward on apply to box click ok

6b)
i)shapes
ii)clip air

6ci)
i)launch the coreldraw application
ii)click on ellipse tool or F+ on Keybord and drag

6cii)
i)on the coreldraw enviroment
ii)click on text tool and click on the place to add the caption
iii)type “Happy Birthday” from the keyboard

6ciii)
i)highlight the caption
ii)click on fill tool
iii)select red colour from fill colour dialog box

6civ)
i)highlight the caption and click on text on the menu bar
ii)click on text to path
iii)click on the circular object with the arrow


*DATA PROCESSING ANSWERS*
*SECTION A*
_(Answer Three Questions)_

(1a)
Teleconferencing is the use of telecommunication devices to hold discussions between participants in different locations.

(1b)
(i) For cash withdrawals
(ii) For deposits
(iii) For transfer of funds

(1ci)
Modem transmits digital data over communication lines. The conversion of the signals to/from analog to digital is the main purpose of a modem.

(1cii)
(i) Electronic Mails
(ii) Telephone messages

=============================================

(3a)
(i) They might have been experiencing difficulties in resource Sharing
(ii) They might have lost some crucial data, so they want to connect it for Data Protection and Redundancy
(iii) Ease of Administration
(iv) To maintain complex internal communications systems

(3b)
(i) Modem
(ii) Network Router
(iii) Network Hub
(iv) Network Switch


(3c)
(i) Modem - It modulates and demodulates the signal between the digital data of a computer and the analog signal of a telephone line.
(ii) Network Router - This is responsible for routing traffic from one to another network.
(iii) Network Hub - This is used to connect multiple network hosts also for data transfer.
(iv) Network Switch - It helps in filter and forwarding of data

=================================================



(4ai)
Entities: are usually recognizable concepts, either concrete or abstract, such as person, places, things, or events which have relevance to the database

(4aii)
Attribute: refers to a database component, such a table. It also may refer to a database field. In other words Attributes describe the instances in the row of a database.

(4aiii)
Relationships is a common type of database whose data is stored in tables.

(4bi)
Cardinality refers to the uniqueness of data values contained in a column. In other words High cardinality means that the column contains a large percentage of totally unique values and Low cardinality means that the column contains a lot of “repeats” in its data range.

(4bii)
(i)one-to-one (1:1)
(ii)one-to-many (1:M)
(iii)many-to-many (M:N)

==================================================



*SECTION B*
_(Answer Two Questions)_
(5ai)
CD-ROM

(5aii)
I - CD-ROM technology
II - It switch on the CPU
III - Carefully store in a cool dry place.

(5b)
P - It displays video and graphical information generated by the computers graphics adapter allowing the user to interact with the computer.
Q - It carries out the instructions of a computer program.
R - It is used to position a cursor on a computer screen.
S - It is used to input characters and functions in the computer system by pressing button or keys.
T - It converts digital signals generated by the computer into analog signals which can be transmitted over a telephone or cable line and transforms incoming analog signals into their digital equivalent.

(5ci)
Click on your workspace while still holding down your mouse button drag to draw your shape and release button when done

(5cii)
Select the text tool from the tool box/bar "A" and place the cursor on the portable area and type the word "Happy birthday" then curve it using the curve tool from toolbox/bar around the circular shape.

(5ciii)
To change the colour of the caption to green: Select the caption on the work area "Happy birthday" and choose green colour from there

=============================================


(6ai)
Highlight the table created containing the values presented and select the bar chart icon and select the bar and instantly this transform to the bar chart

(6aii)
-Column: Click the column before the particular space you wish to add another column and right click then select insert from the drop down menu and click on column either to top or down
-Row : Click the row before the particular space you wish to add another row and right click , then select insert form the drop down menu and select row either to the right or left

(6ai)
Highlight the table created containing the values presented and select the bar chart icon and select the bar and instantly this transform to the bar chart

(6aii)
-Column: Click the column before the particular space you wish to add another column and right click then select insert from the drop down menu and click on column either to top or down
-Row : Click the row before the particular space you wish to add another row and right click , then select insert form the drop down menu and select row either to the right or left

(6b)
Click the document you wish to add page button to.
Go to the design tab on the menu bar on the page background select page borders and click on the page border tab select the desire design and choose a color select the width drop down arrow and choose a line width and click OK to apply the line border

(6c)
Highlight the text " Waec Exam". Select Hyperlink from the menu bar as this will open the insert hyper link windows, type the In the web page address or website address
Theory completed