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BIOLOGY THEORY & OBJECTIVE
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BIOLOGY OBJ:
1-10: BBEADBEEEC
11-20: DADBDCDDDB
21-30: ADECBDADEC
31-40: DADAAAACBA
41-50: BCEABCCCDB
51-60: EABBDDCCBB
1ai)
I. Plants need sunlight for the process of photosynthesis.
ii. Plants use chlorophyll and light to make food.
1b)
i.humerus
ii.radius
iii.ulna
iv.the ball and socket shoulder joint
v. Scapula
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(2ai)
Germination of seed refers to all changes that occur when the embryo in a seed resumes its growth and development to become independent seedling.
(2aii)
The two types of germination are:
Epigeal germination
Hypogeal germination.
Epigeal germination is the type of germination in which the cotyledon is carried above the soil during germination. The plant exhibiting this type of germination are cow pea, pepper,
Hypogeal germination is the type of germination is which the cotyledon is retained in the soil during germination. Hypogeal germination is exhibited by maize, guinea corn.
(2b)
water ---- coconut, oil palm fruit,
wind ---- cotton seed and clematis
Animals --- mango, orange.
Human --- cashew, pear.
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(3ai)
Conservation can be defined as the judicious use of natural resources to ensure their availability and preserve the quality of the environment.
(3aii)
It ensures continuous source of plant nutrient.
It ensures source of water and reservoir for soil nutrient.
To ensure preservation of soil fertility
To ensure sources of raw materials for industries
To ensure medium for agriculture.{pick any four}
(3bii)
Crop rotation is a system of farming where a crop is cultivated in a piece of land in a definite sequence in such a way that a deep rooted crop succeeds a shallow feeder and the shallow feeder succeeds a legume.
(3bii)
It ensures maximal use of the soil nutrient
It helps to renew soil fertility by the activities of the leguminous crop
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4A
OSMOSIS :: a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one.
PLASMOLYSIS contraction of the protoplast of a plant cell as a result of loss of water from the cell.
Diffusion is the net movement of molecules or atoms from a region of high concentration to a region of low concentration as a result of random motion of the molecules or atoms
