NECO 2019 Biology Obj & Essay Answer Now Available

BIOLOGY OBJ
01-10: EDBABEBAEA
11-20: EACDABAAED
21-30: ACBDBDEACE
31-40: DACBEABBAD
41-50: BADDDDBCAD
51-60: BDAEBCBACA

READ MORE: NECO 2019 Financial Accounting Answer Now Available

(1a)
(i) A habitat is an ecological or environmental area that is inhabited by a particular species of animal, plant or other type of organism. It is the natural environment in which an organism lives, or the physical environment that surrounds a species population.

(ii) temperature is an objective measurement of how hot or cold an object is. It can be measured with a thermometer or a calorimeter. It is a means of determining the internal energy contained within a given system.

(iii) population can be define as all the organisms of the same group or species, which live in a particular geographical area, and have the capability of interbreeding

(1bi)
(i)Choose and locate the sample plot;
(ii)Then identify the species in the plot
(iii)Measure the area with a measuring tape to know the area of the habitat ;
(iv)Throw or toss the quadrat randomly at interval for up to 10 or above times ;
(v)After each throw or toss , the number of species within the area of quadrat is recorded ;
(vi)The density of species is calculated by dividing the average number of times the species occur within the quadrat by the area of the quadrat.

(1bii)
(i)Anemometer
(ii)Barometer
(iii)Thermometer
(iv)Hygrometer
(v)Wind vane
(vi)Turbidimeter

(1biii)
(i)very high annual rainfall
(ii)high average temperatures
(iii)nutrient-poor soil
(iv)high levels of biodiversity
(v)high animal and vegetal biodiversity
(vi)evergreen trees dark and sparse undergrowth interspersed

(3a)
(i) Bones are rigid, non-flexible, and tough, whereas cartilage is flexible and are soft-elastic.
(ii) Bones grow in both directions (bidirectional) while cartilage grows in the single direction (unidirectional).
(iii) Bones cells are also known as Osteocytes while cartilage cells are also known as Chondrocytes.
(iv) Bones are active participants of blood supply; Cartilage are not the participants in blood supply, except in perichondrium.

(3aii)
(i) Hydrostatic skeleton
(ii) Exoskeleton
(iii) Endoskeleton.

(3bi)

(3bii)
– Parenchyma
– Collenchyma
– Sclerenchyma
– Xylem
– Phloem

(4ai)
Tabulate

-Enzyme-
(i)Ptyalin
(ii)Pepsin
(iii)Lactose

-Source-
(i)Saliva
(ii)Gastric acid
(iii)Intestinal juice

-Site of action-
(i)Mouth
(ii)Stomach
(iii)Small intestine

-Substrate-
(i)Starch
(ii)Protein
(iii)Lactose

4aii)Mention 3 types of heterotrophic nutrition.
They are:
– Holozoic nutrition
– Saprobiontic/saprophytic nutrition
– Parasitic nutrition

(4aiii)
(i)Mosquito
(ii)ticks
(iii)leeches

5ai)
Commensalism, in biology, a relationship between individuals of two species in which one species obtains food or other benefits from the other without either harming or benefiting the latter.

ii) Remora fish

iii)- gray water
– rainwater collection
-Condensate Water

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