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Thursday, 25 April 2019

WAEC 2019 Biology Verified Questions And Answers


BIOLOGY OBJ LOADING..

Use This Is More Accurate Biology -Obj

1- CBABBDBDCB
11- DDCAABAABD
21- CCCAAACDDB
31- DBADDAACDD
41- ACDDABDCDB

  BIOLOGY THEORY QUESTIONS PAPER PICTURES 




BIOLOGY  ANSWERS LOADING...


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.


*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.

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.
[4/26, 9:36 AM] ‪+234 701 440 8299‬: BIOLOGY-ANSWERS
(6ai)
The enormous energy of lightning breaks nitrogen molecules and enables their atoms to combine with oxygen in the air forming nitrogen oxides. These dissolve in rain, forming nitrates, that are carried to the earth.
(6aii)
This organism oxidizes ammonia into nitrite as a metabolic process. Nitrosomonas are useful in bioremediation. They are important in the nitrogen cycle by increasing the availability of nitrogen to plants while limiting carbon dioxide fixation.
(6aiii)

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









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Wednesday, 24 April 2019

Geography 3 Practical WAEC 2019 Questions and answers


NIGERIA GOEGRAPHY 3 PRACTICAL QUESTIONS PAPER PICTURES


GOEGRAPHY 3 ANSWERS BELOW

A-rahman_Reality:-
8(a)* Food chain food chain is a linear network of links in a food web starting from producer organisms (such as grass or trees which use radiation from the Sun  to make their food) and ending at apex predator  species (like grizzly bears  or killer whales), detritivores (like earthworms or woodlice),  or decomposer species (such as fungi or bacteria)._
Q4(a) Lake

A lake is an area filled with water, localized in a basin, that is surrounded by land, apart from any river or other outlet that serves to feed or drain the lake.
Q8(a)
Food chain

A food chain is a linear network of links in a food web starting from producer organisms (such as grass or trees which use radiation from the Sun  to make their food) and ending at apex predator  species (like grizzly bears  or killer whales), detritivores (like earthworms or woodlice),  or decomposer species (such as fungi or bacteria).

 A food chain also shows how the organisms are related with each other by the food they eat. Each level of a food chain represents  a different trophic level.
[4/24, 2:10 PM] ‪+234 802 247 0179‬: 4a)
The expected points included:
– when the ground is heated by the sun
– there is evaporation and evapo-transpiration
– air rises to high attitude
– cooling of air with attitudes lead to saturation
– condensation takes place around hydroscopic nuclei
– there is coalescence of particles to form clouds.
[4/24, 2:19 PM] ‪+234 802 247 0179‬: 7a) *RAIN GAUGE*: An instrument used by the meteorologists to measure the amount of rainfall over a period of time is the rain gauge. Rainfall is generally measured in millimeters or inches. ... The standard rain gauge instrument generally consists of a funnel connecting to a graduated cylinder which is marked in millimeters.
[4/24, 2:19 PM] ‪+234 802 247 0179‬: 7b) Do not place a rain gauge under trees or roofs to avoid extra collection of water.

ii) Prevent it from any obstruction.

iii) Place it on a raised fixed platform to avoid splashing water from entering.
[4/24, 2:29 PM] A-rahman_Reality: 4a)
The expected points included:
– when the ground is heated by the sun
– there is evaporation and evapo-transpiration
– air rises to high attitude
– cooling of air with attitudes lead to saturation
– condensation takes place around hydroscopic nuclei
– there is coalescence of particles to form clouds.
[4/24, 2:29 PM] A-rahman_Reality: (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


3a)
Mode of formation : Chemically formed sedimentary rock rock are formed when chemical sediments accumulates over a long period of time. These sediments then 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
[4/24, 2:29 PM] A-rahman_Reality: (Number 3)


(3a)
Direct printing is the process of printing textiles by passing them between a succession of rollers having different colors and different parts of the pattern.

(3b)
Analogous colors are groups of three colors that are next to each other on the color wheel, sharing a common color, with one being the dominant color, which tends to be a primary or secondary color, and a tertiary.

(3c)
Comic strip is a sequence of drawings arranged in interrelated panels to display brief humor or form a narrative, often serialized, with text in balloons and captions.

(3d)
Thumbnail sketches are drawing quick, abbreviated drawings. Usually, they are done very rapidly and with no corrections - you can use any medium, though pen or pencil is the most common.

(3e)
Optical spacing is the "look" of the typeset letters in relation to each other, which may or may not be geometrically accurate due to optical illusions caused by the proximity of various letter shapes. In good typeface design, spacing between lowercase letters is "built in."
[4/24, 3:47 PM] A-rahman_Reality: *WE ARE DONE FOR TODAY*

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GEOGRAPHY 3 HAS NO OBJECTIVES


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