Biology Past Questions

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Past Questions

5,032 questions
Question 1 of 20 5,032 total questions
Question 2471
jamb 1979

Insect show consideration powers of water conservation. This is due to the fact that

AThe chitinous cuticle is impregnated with tanned protein
BNitrogenous waste is eliminated as urea
CChitin is impermeable to water
DThe malpighian tubules are impermeable to water
EThe curticle is covered with wax
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Question 2472
jamb 1979

Grasses → Grasshoppers → Lizards  → Snakes →  Hawks

Which of these is not true? Grass in the above food chain

Atrap all the sunlight
Btrap a small percent of the sun energy
Care primary producers
Dare eaten by primary consumers
Econtains chlorophyll
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Question 2473
jamb 1979

Grasses → grasshopper→ lizard → snakes → hawks. In the food chain, the organism which are the least in number are

Agrasses
Bgrasshopper
Clizards
Dsnakes
Ehawks
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Question 2474
jamb 1979

The major function of contractile vacuole in amoeba is?

Ato secrete enzyme to digest food particles
Bto store excess food materials
Cto excrete nitrogenous waste
Dto absorb water from the surrounding
Eto collect and expel water in the cytoplasm
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Question 2475
jamb 1979
The one-seeded fuit in which the pericarp and the seed coat have become fused together is known as
Aachene
Bsamara
Ccaryopsis
Dlegume
Edrupe
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Question 2476
jamb 1979
Identical twins are produced under one of the following conditions
ATwo oval fertilized at the same time by two sperm
Bone ovum ferilized divides to give two embryos
Cone ovum fertilized, twins formed shortly before birth
DTwo ova fertilized by one sperm
Eone ovum fertilized by two sperm
View Explanation & Discuss
Question 2477
jamb 1979
The maize grain is regarded as a fruit and not a seed because
AIt is covered by a sheath of leaves
BThe testa and fruit wall fuse after fertilization
CIt has both endosperm and cotyledon
DIt has coleorhiza and coleoptile
EThe pericarp and seed coat are separated
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Question 2478
jamb 1979
The blood vessel which carries digested food from the small intestine to the liver is the
ARenal vain
BRenal artery
CHepatic artery
DHepatic portal vein
ECoelic artery
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Question 2479
jamb 1979
The hepatic portal vein is characterized by
ABeginning and ending with capillaries
BConnecting the liver and the kidney
CCarrying deoxygenated blood
DEnding with large capillaries
EHaving no capillaries
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Question 2480
jamb 1979
The digestive enzyme that coagulates proteins in milk is
APtyalin
BPepsin
CRenin
DTrypsin
EAmylase
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Question 2481
jamb 1979

If you cross breed a tall variety (Tt) of maize with a short variety (tt), the ratio of tall to short plants in the offspring will be

A2:1
B1:2
C1:1
D1:3
E3:1
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Question 2482
jamb 1979
One of the following statement is not true of viruses
AThey are micro-organisms
BThey are smaller than bacteria
CThey can be seen with an ordinary light microscope
DThey cause tobacco disease
EThey cause polio and smallpox
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Question 2483
jamb 1979
Bacteria inhabiting legume root nodules and which add atmospheric nitrogen to the soil are referred to as
ADenitrifying bacteria
BNitrifying bacteria
CNitrogen fixing bacteria
DNitrogen freeing bacteria
ENitrogen putrefying bacteria
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Question 2484
jamb 1979

Which one of the following is not an excretory product?

AUrine
BSweat
CFaeces
DSalts
ECarbon-dioxide
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Question 2485
jamb 1979
In which of the following tissue do the cells have the ability to divide?
AMeristem
BSclerenchyma
CPhloem
DCollenchyma
EPith
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Question 2486
jamb 1979
A gland in the human body secretes two hormones, one of which causes a disease called diabetes when there is a deficiency. Which of these organ produce the hormone?
Aspleen
BParathyroid
CAdrenal body
DThyroid
EPancreas
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Question 2487
jamb 1979
The farmer cannot check soil erosion effectively by
AConstructing is ridges of planting across the slope
BCultivating cover crops
CPractising strip farming
DClearing the land of vegetation
EConstructing terraces
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Question 2488
jamb 1979
Which of these is not a type of soil?
ASand
BGranite
CLoam
DClay
ESandy loam
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Question 2489
jamb 1979
The dry indehiscent, winged fruit formed from one one carpel is known as
ASchizocarp
BCaryopsis
CSamara
DNut
EFollicle
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Question 2490
jamb 1979
The plumule is best described as?
APart of the cotyledon
BPart of the endosperm
CA miniature shoot
DStructure near the micropyle
EStructure opposite the hilum
View Explanation & Discuss
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