Biology JAMB, WAEC, NECO AND NABTEB Official Past Questions

ai. What are sense organs?

ii. Name three sense organs that respond to the stimulus of chemicals

b. List three animals each that exhibit the following courtship behaviours
i.territoriality ii. pairing

ci. State one similarity between the eggs of toad and the eggs of birds.

ii. State three differences between the eggs of toads and the eggs of birds.

d. Complete the table below by listing four organisms involved in the nitrogen cycle and state one role each of the organisms.

e. Complete the table below by naming two types of heterotrophic modes of nutrition in animals and give two examples each of the organisms that carry out the modes of nutrition.   

a. Complete the following Punnett squares of a dihybrid cross between two rats. One has black fur (BB) and short tail (tt), the other has brown fur (bb) and long tail (TT).

(b)i.How many of the offspring will have black fur and short tail?

ii. How many of the offspring will have brown fur and long tail?

iii. How many of the offspring will have black fur and long tail?

iv. How many of the offspring will have brown fur and short tail?

(c)

i.If there were twenty (20) chromosomes in the leaf cell of a plant, how many chromosomes would be in each of the following cells of the plant?pollen grain.

ii. If there were twenty (20) chromosomes in the leaf cell of a plant, how many chromosomes would be in each of the following cells of the plant? guard cell.

iii. If there were twenty (20) chromosomes in the leaf cell of a plant, how many chromosomes would be in each of the following cells of the plant? ovule.

iv. If there were twenty (20) chromosomes in the leaf cell of a plant, how many chromosomes would be in each of the following cells of the plant? root cell

a.Relationships I, II, III, IV and V exist among some organisms in an ecosystem. Use them to answer the question
I: Organism A grows on dead organism B.
II: Organism C feeds on the remnants of food left by organism D without affecting organism D negatively or positively
III: Organism E provides shelter for organism F while organism F transports organism E towards food
IV: Organism G kills organism B for food
V: Organism H feeds on organism J, causing organism J a disease.

Name the type of relationship in: I,II,III,IV,V

b. what is the biological term for each of organisms B and G?

c. Name one example each of organisms B to J

di.  Name the relationship that is most beneficial to the ecosystem.

ii Give one reason for the answer in 3d(i)

ei. Give two examples of organism A

ii. Name the group to which organism A belongs

a.Complete the table below

b.Name three classes of organic foods which are essential constituents in the diet of a mammal.

c.State two roles each of the following structures of the digestive system in humans:
 i.buccal cavity   ii, duodenum iii.stomach

d. Name the end product of adding dilute hydrochloric acid to sucrose

a.What is classification of living things?

b. State four ways each by which the following groups of organisms are of economic importance in their habitats:
i) fungi ii) plants.

c. complete the table below by stating five major phyla of the kingdom Animalia and give one example of each

A sudden change in the genetic composition of an organism is termed

Paternity disputes could be resolved accurately through

The capturing and digestion of insects by a pitcher plant is a special form of nutrition that is

The following activities are associated with termites except

Use the information below to answer the question
I – making shoes from crocodile skin
II – making tables with plastic
III – using elephant tusk for decoration
IV – using firewood for cooking
In order to avoid some of the acts that would have negative effects on conservation. Government should

Use the information below to answer the question
I – making shoes from crocodile skin
II – making tables with plastic
III – using elephant tusk for decoration
IV – using firewood for cooking

The act that should be encouraged for the conservation of wildlife and forests is

The diagram above is an illustration of some structures used for gaseous exchange in humans. Study it and answer the question
the part labeled III can be found in the 

The diagram above is an illustration of some structures used for gaseous exchange in humans. Study it and answer the question
The parts labeled 1, II, III, and IV respectively are

The androecium in a flowering plant is a collection of

The tricuspid valve is located between the

Fishes survive in water mainly because they possess

The diagram above is an illustration of a cell in which photosynthesis takes place. Study it and answer the question. the oxygen gas formed in the cell diffuses out of the cytoplasm into the air spaces through the part labeled

The diagram above is an illustration of a cell in which photosynthesis takes place. Study it and answer the question

In which of the labeled parts would molecules of water and carbon (IV) oxide combine to form sugar?

The illustration above is a genetic diagram. Study it and answer the question

What is the genotypic ratio

The illustration above is a genetic diagram. Study it and answer the question below

What do the labels I, II, III, and IV respectively represent?                                                               

The illustration above is a genetic diagram. Study it and answer the question below.
          What is the name of the genetic diagram?