Free 2019/2020 Nabteb Gce Biology Practical Questions and Answers Expo

2019 NABTEB BIOLOGY SOLUTION POWERED BY GurusVoice Team

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(1a)

* ear osicles 

*eustachian tube 

(1b)

*it transports oxygen 

*it regulates temperature 

*it transport  excretory  products 

*it defend the body against  infection 

*it transport  digested food 

*it transport  hormones 

Pick any two 

(1c) 

* xllen 

* phoem

(1d)

To distrupt the cell membranes and softens the cuticle and the cell walls to extract  the chlorophyll 

*to broke down the chlorophyii and taking  the green color  out of the leaf 

(1e)

1.water

2.urea

3.carbondioxide

4.sweat

5.bile salts

Pick any two 

(1f) 

I. It is herbaceous plant 

II. It has an underground stem that can live a long time 

(1g)

I. Olfactory  tubes

II. Cerebellum 

(1h)

I. External factors like availability  of nutrients, humidity, light

II. Internal  factors like hormones 

(1i)

I. Terracing 

II. Contour ploughing 

III. Construction  of drainage  

Iv. Strip cropping 

V. Mulching 

Pick any 2

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NUMBER 3 LOADING

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(4ai)

1.part containing a seed

2.weed

3.remain of style

4.position of reside 

5.attachment to cob

6.scar left by style

(4aii) 

Vi- dry dehiscert fruit 

Vii- dry  indehiscent of fruit 

Vii- dry indehiscent of fruit 

Ix- dry indehiscent of fruit 

X-  dry indehiscent of fruit 

(4bi)

Vi- dispersed by animals 

Vii-dispersed  by wind

(4bii)

Vi- fruit  of seed may have wings 

Vii- the fruits  of seed may have hooks or hairs by means of which they adhere to the hairs of animals 

(4c)

* to prevent  disease  form spreading  among plant  species  

* to prevent  over crop of plants

* to prevent  undesirable  competition for space, light, water, and nutrients 

Pick any two

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5ai)

Xi-female inflorescence of maize

Xii-pride of Barbados 

5aii)

1.filament

2.bract

3.anther

4.stigma

5.anther

6.filament

7.stilr

8.petal

9.nectary tube

10.ovary

5bi)

*4(stigma):receives pollen grains  at pollination 

*5(antner):contains the pollen grains

*8(petal):attract insect  which pollinate  flower 

*10(ovary):contains the ovules,develops into fruit 

(5bii)

Xi- insects

Xii- winds

(5c)

Please  tabulate it

Xi

1.absence of nectar

2.flowers are full in colour

3.petals/sepals are small and incinspicuous

Xii)

1.nectar is present

2.flowers are bringht in colour 

3.petals/sepals are large and conspicuous