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Under: 2021 NECO BIOLOGY OBJ
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1a )
- In the search of food for their survival.
- To protect themselves from their enemies.
3.To get a suitable temperature for their reproduction.
4.To get a perfect habitat to increase their survival rate
bi ) it is responsible for the transport and distribution of sugars produced by the photosynthesis.
ii) it is responsible to produce food for the plant by photosynthesis
iii) it is responsible to transport water from roots to stems and leaves, but it also transports nutrients.
iv) it is responsible for reproduction
1ci)
- Low Water Requirements
2.Ability to Quickly Absorb Water
- Small or No Leaves
1cii)
- Asexual Reproduction
- Growth
- Tissue Repair
1di)
An image is formed on the retina with light rays converging most at the cornea and upon entering and exiting the lens.
Rays from the top and bottom of the object are traced and produce an inverted real image on the retina.
The distance to the object is drawn smaller than scale.
1dii)
- Morphological Evidences
2. Embryological Evidences
3.Geographical Evidences
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(2a)
-[Pick any two]-
(i) orbit
(ii) eyelashes
(iii) eyelids
(iv) conjunctiva
(v) lacrimal glands
(2b)
(i) Excretion is a process in which metabolic waste is eliminated from an organism.
(ii) Competition is an interaction between organisms or species in which both the organisms or species are harmed.
(iii) Deforestation refers to the decrease in forest areas across the world that are lost for other uses such as agricultural croplands, urbanization, or mining activities.
(2c)
(2d)
(i) Freezing
(ii) Boiling
(iii) Dehydration.
(iv) Canning.
(v) Salting
(vi) Sweetening
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3a)
i. four daughter cells
ii. two identical daughter cells
3bi)
- Sexual Reproduction produces variable offspring creating diversity and variation among populations
- It is important for plants as it provides variation to the progeny that helps in better survival
- It is very much important for evolution.
3bii)
The relationship between remora fish and shark can be considered as mutualism. Remora attaches itself to the shark, to travel different parts of the sea by floating with the shark. It helps the remora fish to travel without burning energy. They also get to eat scraps of food dropped by the shark.
3ci)
- fever
- dry cough
- tiredness
3cii)
The main blood vessel that carries blood from the kidney and ureter to the inferior vena cava.
3d)
i. An ecological niche is the part of the environment into which a species fits, and to which it is adapted.
ii. Population density is the number of individuals per unit geographic area, for example, number per square meter, per hectare, or per square kilometer.
iii. A climax community is the final stage of succession, remaining relatively unchanged until destroyed by an event such as fire or human interference.
