BIOLOGY . ESSAY 

10:00AM-11:30AM



Join Our Telegram Channel For Free Math Papers



Keep Subscribing With Us @ Waecupperoom.blogspot.com To


Enjoy Our Service And Get Your Verified


Solution Before the Exam Time.




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






NECO-BIOLOGY -2021-ANSWERS






COMPLETED AND DUSTED




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

Waec Upper Room Solution


*NECO 2021 BIOLOGY VERIFIED OBJ*

Biology -Obj!


1CBABBDBDCB

11DDCAABAABD

21ACDABCBBAC

31ABABCCCCBA

41AABCDDCBAB

51ABCCBCBCBD


*obj done and dusted like it's nothing.....* *60/60 assured*


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

*NECO 2021 VERIFIED BIOLOGY THEORY*


*NUMBER 1*

1a) 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


1c


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…….

*Number 6*

6aiii)

Azotobacter helps to synthesizes some biologically active substances, including some phytohormones such as auxins, thereby stimulating plant growth.


(6b)

(i) Malphigan tubule

(ii) Nephridium


(6c)

(i) Hepatitis: This is a liver disease defined as inflammation of the liver. It may occur as a result of viral infection or toxic substances like poisons or drugs. This disease makes the liver unable to perform it’s functions properly.


(ii) Kidney stones: This is caused by diseased growth in the kidneys within the tubules. This growth narrows rye tubules preventing free flow of urine. It most causes complete blockage of. Urine results.

*Number 2*

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.


*Number 3*

(3ai)

A sperm cell consists of a head, middle piece and a whip-like tail. At the anterior end of the head is a structure called Acrosome. This Acrosome contains a liquid which facilitates the entry of the sperm into an egg. The middle piece contains numerous mitochondria which are involved in producing energy needed for propelling the sperm after ejaculation. The tail is for movement.

(3aii)

A palisade cell contain chloroplasts which makes them a site of photosynthesis in the leaves of those that plants that contain them, converting the light to the chemical energy. Beneath the palisade mesophyll are the spongy mesophyll cells, which also perform photosynthesis. They allow the passage of gases through the intercellular spaces in them.

(3b)

Draw the Diagram

(3c)

In a tabular form:

Under mammals:

(i) Mammals give birth to their young ones alive

(ii) Mammals product amniotic eggs.

Under amphibians:

(i) Amphibians lay eggs

(ii) Amphibians do not produce amniotic eggs.

(3d)

(i)Use of condoms/pills.

(ii) Withdrawal method


*We are solving fast and accurately* ✍️✍️✍️✍️