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Waec Biology Answers 2021 for 10th September

Waec Biology Answers 2021 for 10th September

By October 18, 2023 WAEC 0 Comments

Waec Biology Answers 2021, 2021 WAEC Biology Answers and Questions Released, WAEC Biology Questions and Answers 2021/2022, 2021 WAEC Biology Objectives Questions and Answers, 2021 WAEC Biology Questions and Answers, Expo/Runs, WAEC Biology 2021 Questions and Answers (100% FREE), WAEC Biology Questions & Answers 2021/2022 (OBJ & Theory), WAEC 2021/2022 Biology Questions and Answers.

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Waec Biology Answers 2021 for 10th September 2021

If you writing Biology as one of the subjects in this 2021 Waec, be assured that you will Score High in this subject this year in Waec, as we said earlier we guarantee you a score of A1 to B2 in Waec so that you will be Proud of Us In Anywhere Of Your School

Waec 2021/2022 Biology Obj & Essay Questions and Answers, Waec 2021/2022 Biology Obj & Essay Questions and Answers, Waec 2021/2022 Biology Obj & Essay Questions and Answers.

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Our Waec questions and answers also contain both Waec 2021 Biology theory questions and also the correct 2021 Waec Biology questions and answers for Objective all in this July/August Waec 2021 Biology question and answer. The questions and answers were sourced from an insider of the Waec African examination council and were confirmed to be accurate by another insider of the West African Examination Council. The Waec Biology questions 2021 also contain the Waec 2021 Biology answers to both theory Questions and Objective questions. There is a need to carefully look into the Waec Biology 2021 questions and answers for all those who want to get there As and make it through in Waec 2021.

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Waec Biology (Obj & Essay) Exam Date 2021

Friday, 10th September 2021

  • Biology 2 (Essay) 9:30am. –11:10am.
    Biology 1 (Objective) 11:10am. –12:00noon.

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Waec Biology Questions and Answers 2021, Waec Biology 2021 Answers, 2021 Waec Expo Biology Questions And Answers, Waec Biology Questions and Answers 2021, Waec Biology question and answer 2021, Waec Biology Questions 2021 Answers, Waec Biology answers 2021, Waec Biology Questions and Answers 2021, Waec Biology Questions and Answers 2021

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WAEC 2021 prayers.
Our father who is in Nigeria and West Africa.
WAEC is in thy hand.
As it’ll be done in August, September, and October.
Throughout Nigeria’s states and West Africa.
Give us our A’s and B’s.
And forgive us our mistakes.
In Practical, Objectives, and Theory Papers, help us to succeed.
As we forgive those who copy from us,
Deliver us from failures and pending errors.
Show your power and glory to take us 100 Level in Universities/Polytechnics.
By removing our six years uniform in Secondary School.
To wear our desired clothes to classes in Higher Institution.
If You believe, comment “AMEN”

Waec Biology Answers 2021, Waec Biology Questions and Answers 2021, Waec Biology Expo 2021, Waec Biology Runs 2021.

Some Past Exam Answers for Reference

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FURTHER MATHS OBJ
1CACCBABCAB
11DBBACCDCBB
21DAAACCACAC
31BDBCBCABCC
Completed.
••••••••••••••••••••••••••••••••••••••••

I

2021 WAEC Biology Essay & OBJ Answers [10th September]

COMPUTER OBJ
1-10: BCACCBCBDC
11-20: BABAAACADD
21-30: DCDBCCAABD
31-40: AADBDBBBBA
41-50: ABABACACDC
Completed.

(1a)
Report in data base syterm is the formatted result of database queries and contains useful data for decision-making and analysis.

(1b)
(i)Database reporting tools allow you to access any database and create reports based upon the stored data.

(ii)Relational databases store data in tabular relations. A database reporting tool typically queries relational databases using SQL over a JDBC or ODBC connection.

(iii)Database reporting on NoSQL big data sources relies on a customized SQL connector, ETL solution, or another native way at accessing data.

(iv)With Logi Report, you have the flexibility to embed reports, dashboards, and visualizations created from any data source.

(1c)
(i) Click File > Print.

(ii) To preview each page, click the forward and backward arrows at the bottom of the page. If the text is too small to read, use the zoom slider at the bottom of the page to enlarge it.

(iii) Choose the number of copies, and any other options you want, and click the Print button.
•••••••••••••••••••••••••••••••••••••••••
(2a)
First, convert AB1¹⁶ into decimal, by using above steps:
= AB1¹⁶
= A × 162B × 1611 × 160
= 273710
Now, we have to convert 273710 to octal
2737 / 8 = 342 with remainder 1
342 / 8 = 42 with remainder 6
42 / 8 = 5 with remainder 2
5 / 8 = 0 with remainder 5
Then just write down the remainders in the reverse order to get the answer, The hexadecimal number AB1 converted to octal is therefore is equal to 5261

(2b)
Decimal equivalent of “1” = 1 × 3^1 = 3
Decimal equivalent of “1” = 1 × 3^2 = 9
Decimal equivalent of “0” = 0 × 3^3 = 0
Decimal equivalent of “1” = 1 × 3^4 = 81
Decimal equivalent of “1” = 1 × 3^5 = 243
Decimal equivalent of “110111” = 243810931
110111 = 337
Now we will convert the fractional part 0.101 to decimal form (Don’t forget that we start from tenths palce to so on..):
Decimal equivalent of “1” = 1 × 3^-1 = 0.33333333333333
Decimal equivalent of “0” = 0 × 3^-2 = 0
Decimal equivalent of “1” = 1 × 3^-3 = 0.037037037037037
Decimal equivalent of “0.101” = 0.3333333333333300.037037037037037
0.101 = 0.37037037037037
Here is the final answer, The ternary number 110111.101 converted to decimal is therefore equal to:
= 110111.1013
= 33710 + 0.3703703703703710
= 337.3703703703703710

(2c)

First, convert 5078 into decimal, by using above steps:
= 5078
= 5 × 820 × 817 × 80
= 32710
Now, we have to convert 32710 to binary
327 / 2 = 163 with remainder 1
163 / 2 = 81 with remainder 1
81 / 2 = 40 with remainder 1
40 / 2 = 20 with remainder 0
20 / 2 = 10 with remainder 0
10 / 2 = 5 with remainder 0
5 / 2 = 2 with remainder 1
2 / 2 = 1 with remainder 0
1 / 2 = 0 with remainder 1
101000111²
••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
(3ai)
Universal Serial Bus (USB) is a common interface that enables communication between devices and a host controller such as a personal computer (PC) or smartphone.

(3aii)
(i)It is very easy to install USB device and requires only OS (Operating System).
(ii)USB supports different data rates from 1.5 Mbps to 5 Gbps with different distances.

(3b)
Loading…
••••••••••••••••••••••••••••••••••••••••••••••••••••••••
((4ai)
Computer graphics deals with creation, manipulation and storage of different type of images and objects.

(4aii)
– Choose any 2
i. Computer Art
ii. Computer aided drawing.
iii. Presentation Graphics.

(4bii)
Interactive Fill tool: Interactive Fill tool to color the fish modified in other videos. To apply an interactive fill, click the Interactive Fill tool, click an object, and then drag. To change the fill colors, drag colors from the color palette to the square handles or to the fill path.

(4biii)
Texture Fill tool: A texture fill is a randomly generated fill that you can use to give your objects a natural appearance. You can use existing texture fills, such as water, minerals, and clouds, or you can edit a texture to create your own texture fill. You can use colors from any color model or palette.

(4iii)
Evenlope Tool: Envelope Tool is used to create and manipulate “control points” at various points in the track. The control points then determine its volume changes over time.

(4iv)
Extrude Tool: The Extrude tool is used in conjunction with an existing 2D shape or shapes in the scene. It allows you to create an extruded 3D shape from the selected 2D shape by defining various parameters.
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WAEC Biology Questions and Answers 2021 – Jobs In Nigeria

(1a)
(Choose Any Five)
(i) Rent Rates & Taxes.
(ii) Workforce Availability, Labor Skills & Costs.
(iii) Roads, Highways & Traffic Flow.
(iv) Proximity to Airport, Railway Stations & Ports.
(v) Markets & Local – Environment Factors.
(vi) Building Availability & Utility Costs.

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(1b)
(i) Receiving: operations that involve the assignment of trucks to docks, the scheduling and execution of unloading activities.
(ii) Storing: material’s movement from unloading area to its designated place in inventory.
(iii) Order Picking: the process of obtaining the right amount of the right products for a set of customer orders.
(iv) Shipping: execution of packing and truck’s loading after picking, involving also the assignment of trucks to docks
(v) Delivery: the transit time for transportation from the warehouse to the

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

(2a)
(i) By chatting with unknown people
(ii) By sending and receiving pornography
(iii) By using bad language for e-marketing
(iv) By holding personal information
(v) By changing the internet address
(vi) By changing the voice of mode while chatting

(2b)
(i) It reduces the cost of advertisement to Ajax Ltd
(ii) It helps the company to track the rate of return on their investment
(iii) Bulk communication: It helps to reach many customers at the same time
(iv) It brings about effective personalization of messages for Ajax Ltd
(v) It helps the company to know the number of their customers effectively

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

(5a)
(Pick any five)

(i)Marketing planning provides direction for all organization marketing effort
(ii)Marketing planning help organization to raise finance for capital expenditure.
(iii)Marketing planning prevents time wasting on ineffectual marketing activities.
(iv)It save money by helping to ensure that the marketing budget is spent effectively
(v)It helps to identify. prerequisites to planned activities.
(vi)It helps to generate more clients by communicating effectively.

(5b)
The organization formed by Mrs Janet with other dry fish sellers is World Trade Organization (WTO)

(5bii)
(i) Overseeing trade agreement
(ii) Reducing trade barriers
(iii) Reducing worldwide tariffs
(iv) Mediating dispute

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

(6a)
(Pick any Four)
(i)Derived Demand.
(ii)High concentration of production
(iii)Direct channel of distribution
(iv)Few Buyers And Large Volume.
(v)Professional buying

(6b)
(i)Industrial market: It involves set of all individuals and organizations that acquire goods and services that enter into the production of other products or services that are sold, rented, or supplied to others.

(ii)Reseller market:A market consisting of wholesalers and retailers who buy products for resale purposes.Resellers buy finished goods and resell them to the next level in a given distribution channel.

(iii)Government market: A government market is a market where the main buyers are federal, state, and local governmental organizations. They purchase goods or services from private businesses.

WAEC Biology Questions 2021 Theory Answers (Expo)

DATA-PROCESSING-ANSWERS

DATA-Obj!
1DCDABCAAAD
11DBABCACDDD
21BBACABCCAC
31ABBAABBADD

SECTION B.
(6ai)
(i)Fingerprint. …
(ii)Facial Recognition. …

(6aii)
(i)Modems.
(ii)Multiplexers.

(6aiii)
(i)RCA (Stereo audio output)

(6aiv)
(i)Finger print
(ii)Signature

(6bi)
Difference is that to access that on internet an Internet Service Provider (ISP) and a router to connect to the ISP while it is not needed for that of storage

(6bii)
Biometric recognition creates a specific link between an individual and a data record.

(6c)
(i)Data collection
(ii)Data input

(6di)
(I)TO; Email Address
(II)CC; To send to multiple emails
(III)BCC; when you want the message to be shared that you want to keep it secret who get the message
(IV)To the reader
(V)the content of the message

(6dii)
Cc stands for carbon copy which means that whose address appears after the Cc: header would receive a copy of the message. Also, the Cc header would also appear inside the header of the received message. While Bcc stands for blind carbon copy which is similar to that of Cc except that the Email address of the recipients specified in this field do not appear in the received message header and the recipients in the To or Cc fields will not know that a copy sent to these address.
====================================

(5a)
(i)insert the flash drive into a usb port on your computer.

(ii) with your microsoft word document open, click the “file” tab and select “save as.”

(iii)click the “save in” drop-down menu at the top of the save as dialog box.

(iv)navigate to and click the flash drive. the flash drive is typically drive letter “e” or “f.”

(v)type the name of your document into the file name field and click “save” to save the file to the flash drive.

(5b)
(i)navigate to the location where you want to create the folder that is the desktop of the computer.

(ii) hold down the ctrl, shift, and n keys at the same time.

(iii) enter your desired folder name that is “assignment”

(iv) navigate to the location where you want to create the folder.

(v)then save to finish

(5c)
(i)open the folder that contains the word documents you want to print.

(ii) press [ctrl], and select the files you want to print. (if the files are adjacent, select the first file in the list, press [shift], and select the last file in the list.)

(iii) right-click the selection, and select print from the shortcut menu.

(iv) select the desired print options, and click ok. (the selected options will apply to all of the documents.)
====================================

(2a)
TABULATE

=DVD ROM=
– External
– Removable
– Indirect access

=HARD DISK=
– Internal
– Not removable
– Random/Direct access

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=MAGNETIC TAPE=
– External
– Removable
– Indirect access

(2b)
(i)Google Sheets
(ii)Lotus Symphony
(iii)Microsoft Excel
====================================

(3ai)
(i) On the Basis of Size and Capacity, [Supercomputer, Mainframe, Mini, and Micro Computer].
(ii) On the Basis of Purposes, [General and Special Purpose].
(iii) On the Basis of Hardware Design and Type [Analog, Digital, and Hybrid Computer].

(3bii)
-ANALOG COMPUTER-
(i) Analog computers works with continuous values or these types of systems process continuous data.
(ii) Analog computer has very low or limited memory and it can store less amount of data.

-DIGITAL COMPUTER-
(i) Digital computers works with discrete values or these types of systems process discrete data.
(ii) Digital computer has very big memory it can store large amount of data.

(3b)
(i) Access to informations.
(ii) New tools, new opportunities
(iii)Communication.

(3c)
(i) Guided Media
(ii) Shielded Twisted Pair (STP)
====================================

(1a)
(i)Disk formatting is the configuring process of a data storage media such as a hard disk drive, floppy disk or flash drive for initial usage.

(ii) Data backup is a copy of computer data taken and stored elsewhere so that it may be used to restore the original after a data loss event.

(iii) Virus scans: this is the process where antivirus search through your system to locate and remove any malicious threats on your device.

(1b)
(i) it is used for intra bank transfer
(ii) it is used for inter bank transfers
(iii) it is used to check account balance
(iv) it is used for printing of mini statement of account

BIOLOGY OBJ:
1-10: CAABDBBBDC
11-20: AACBDDDCBB
21-30: CBACDAABCB
31-40: CABCCBDDCB
41-50: DCBBCBBAAA
======================================
SECTION A: ANSWER TWO(2) QUESTIONS ONLY
========================================

(1ai)
When the head moves or changes position, the endolymph fluid in the semi-circular canals moves and stimulates the nerve endings. The nerve endings then transmit the impulses through vestibular to the cerebellum of the brain where the new position at the head is interpreted and the appropriate responses sent to the muscular system to maintain body balance

(1aii)
CLICK HERE FOR THE IMAGE

(1aiii)
The middle ear in humans can be split into three parts; external, middle, and inner. The middle ear lies within the temporal bone and extends from the tympanic membrane to the lateral wall of the inner ear. The main function of the middle ear is to transmit vibrations from the tympanic membrane to the inner ear via the auditory ossicles.
===========================================

(2a)
Deficiency diseases are diseases that are caused by the lack of certain essential nutrients, especially vitamins and minerals, in one’s diet over a prolonged period of time

(2aii)
TABULATE
– Beri-Beri ; Intake of vitamin B
– Kwashiorkor; Intake of protein
– Scurvy; Intake vitamin C
– Goitre ; Intake of iodine in diet
– Anaemia; Intake of iron and copper

(2bi)
-Put a few small, freshly cut pieces of yam in a clean test tube, then Pour 10 mL distilled water into the test tube.
-Now, boil the contents of the test tube for about 5 minutes. Allow the test tube to cool.
-Filter the contents of the test tube through a filter paper. Test the obtained filtrate for the presence of starch by adding iodine.
-If colour changes to pink then iodine is presence

(2bii)
-Heat a solution of the orange fruit then add Benedict’s reagent and observing the colour change orange.
-It is a clear blue solution of sodiumand copper salts.
-In the presence of simple sugars, the blue solution changes color to green, yellow, and brick-red, depending.
===========================================

(3a)
TABULATE
(i) Disease: Cholera
Causative organism: Bacterium (vibro cholerae)
Vector: Housefly
Control: Keeping environment clean

(ii) Disease: Sleeping sickness
Causative organism: Trypanosome
Vector: tse-tse fly
Control: use of antiseptic

(iii) Disease: Malaria
Causative organism: Plasmodium (protozoa)
Vector: Female anopheles mosquito
Control: Draining of swamps

(iv) Disease: Ringworm
Causative organism: Trichophyton and microsporum
Vector: None
Control: Keeping of skin clean and dry

(3bi)
Salting is the dusting of farm products with table salt

(3bii)
Irradiation is the drying of some crops or products using the heat from the sun

(3biii)
Smoking is the drying of some farm products over a smoke of a naked fire
===========================================

(6ai)
External fertilization is a mode of reproduction in which a male organism’s sperm fertilizes a female organism’s egg outside of the female’s body.

(6aii)
Internal fertilization occurs most often in land-based animals, although some aquatic animals also use this method. There are three ways that offspring are produced following internal fertilization.

(6bi)
(i)Toad
(ii)Frog

(6bii)
(i)Goat
(ii)Cow

(6ci)
(i)the foetus will not get oxygen
(ii)the foetus will not get nutrients.
(iii)waste products from your baby’s blood will not be removed

(6cii)
[pick three]
(i)fundus
(ii)corpus
(iii)isthmus
(iv)cervix.
================================

(6d)
Competition in feeding among organisms for scarce resources leads to the death of weaker members of the species and the reproduction of the stronger members, leading to a dynamic equilibrium that balances the rate of death to the rate of birth.

(6e)
(i) Problem of Wave
(ii) Effects of temperature
(iii) Salinity of the Marine
(iv) Humidity

(6fi)
Moisture helps in the germination of seeds by helping to activate the metabolic activities needed for germination, dissolved oxygen content in moisture acts is very beneficial to the biochemical process involved in germination.

(6fii)
Viable seeds are healthy and contain the organic requirements for a healthy germination, and is most times resistant to harsh weather conditions, and lack of nutrients.

(6g)
Light energy is considered a limiting factor in production of food by autotrophs because, photosynthesis which is the main process by which autotrophs produce food cannot take place in the absence of light. The energy from light is solely responsible for the process of photosynthesis.

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