WAEC BIOLOGY ANSWER 2017

: BIOLOGY

1 i. 

The classification of living things includes 7 levels: kingdom, phylum, classes, order, families, genus, and species . The most basic classification of living things is kingdoms. 

1ii.   Carolus Linnaeus, also called Carl Linnaeus.

1iii. 

- It Serves as a base for the development of other biological sciences such as biogeography

- Grouping products in a proper manner would help you find what you need easily. 

- Allows systematic methods for finding the object's properties. 

1iv. 

- kingdom

- phylum

- classes

-order

- genus

- species 

- families

1bi. 

- They reproduce at a fantastic rate, but only in living host cells.

- They can mutate.

1bii. 

- They are a cellular, that is, they contain no cytoplasm or cellular organelles.

-They carry out no metabolism on their own and must replicate using the host cell's metabolic machinery.

1ci.  

- fungus

- fungi 

1cii.  

Pick 2

- chickenpox

- small pox

- herpes

- rabies 

- influenza

[11:00, 4/19/2017] Mr-Gaftech: *BIOLOGY ANSWERS*

1ai) Classifications of living things consists of placing together in categories those living things that resembles each other. It involves placing living things into groups that have certain features in common which distinguish them from other groups

1aii) Car von Linnè Also known as Carolus Linnaeus

1aiii)-Classification is important because it allows scientists to identify the organisms

-Classification is important because it makes it easy for scientists to group the organisms.

- It is also good to properly name organisms via a standardized system

1aiv)-Kingdom

- Phylum(Animal) or division (Plant) 

-Class

-Order 

-Family

-Genus 

-Species

1bi) -Vírus can reproduce when present in another living cell

-It possesses characteristics which can be transmitted from one generation to the next

1bii) -When a virus is extracted from a living cell and placed in a non living medium, it assumes a crystalline form and thus become non-living

-Virus cannot respire, excrete  or respond to stimuli

1ci) -Rosette disease

- Cassava mosaic disease

1cii) -Chicken Pox 

-Polio

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2a)i They catalyse reactions by lowering the activation energy of a reaction

ii). They are regenerated after each reaction

iii). They are substrate specific, hence only molecules which are complementary to their shape can bind to it.

iii). They aid in metabolism (anabolism and catabolism)

2bi)-Pancreatic lipase

- Amylase

6ci) An autotroph or producer, is an organism that produces complex organic compounds from simple substances present in its surroundings, generally using energy from light or inorganic chemical reactions.

6d

Function of WHO

1. Providing leadership on matters critical to health and engaging in partnerships where joint action is needed;

2. Shaping the research agenda and stimulating the generation, translation and dissemination of valuable knowledge;

3. setting norms and standards and promoting and monitoring their implementation;

4. Articulating ethical and evidence-based policy options;

5. Providing technical support, catalysing change, and building sustainable institutional capacity;

6. Monitoring the health situation and addressing health trends

6e)

i)plants: Water Wisteria and Java Moss.

ii)Animals: catfish and earthworm

6f)

In tabular form

-Mammalian skin-

i)It has melanin

ii)It has sweat pores

iii)Does not show photosynthesis

iv)It composes of animal cells

v)It is touch receptive

-Plant epidermis-

i)It has chlorophyll

ii)It has stomata

iii)It shows photosynthesis

iv)It is composed of plant cells

v)It is not touch receptive

6gi)

i)Intra specific competition

6gii)

i)Inter specific competition

5bi) 

C(s) + O2(g) =====> Co2(g)

Co2(g) + C(s) =====> 2Co(g)

Fe2O3(s) + 3Co(g) =====> 2Fe(l) + 3Co2(g)

The limestone present decomposes as follows:

CaCo3(s) =====> CaO(s) + Co2(g)

Which is available to remove silicon(iv) oxide impurity

SiO2(s) + CaO(s) =====> CaSiO3(s)

5bii) Faraday's first law of electrolysis states that, the mass (m) of an element discharged during an electrolysis is directly proportional to the quantity of electricity (Q) passing through it.