WAEC 2017 BIOLOGY ANSWER NOW READY
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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
– Phylum(Animal) or division (Plant)
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
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) The Small Intestine
i) Chlorophyll is important to plants because it is the substance that the chloroplast organelles in the cells that carry out photosynthesis – needed by plants as it converts water + carbon dioxide (molecules split by UV light) to glucose (food store for plants) and oxygen.