*BIOLOGY THEORY PRIVATE WASSCE*
*BRAVO TEAM*
*WAEC GCE BIOLOGY OBJ*
1-10 BACDCCABCB
11-20 ADCADCBDCB
21-30 BBCABCBAAA
31-40 ACBACACADC
41-50 DABADBBBAD
Goodluck 🤓✔
*BRAVO TEAM*
*YOU TO ANSWER THREE (3) QUESTIONS IN ALL*
*TWO(2) QUESTIONS SECTION FROM A*
*SECTION B IS FOR GHANA ONLY*
*SECTION C IS FOR SIERRA LEONE,GAMBIA,NIGERIA AND LIBERIA*
*PLEASE READ CAREFULLY BEFORE YOU ANSWER ANY QUESTIONS*
Q1 a) i). ¶ white blood cells
¶ lipids
ii). ¶ responsible for the removal of interstitial fluid from tissues
¶ It transports white blood cells to and from the lymph nodes into the bones
b) i). ¶ oxygen
¶ excretory products, such as carbon dioxide, urea, etc
¶ Hormones
ii) Plants absorb water from the soil through their root hairs which are surrounded by soil water in
the soil. The soil water is a more dilute solution than the soil sap inside the root hair hence
water molecules move from soil water into the root hairs by the process of osmosis. Mineral
salts are absorbed through the cell membrane often from a zone of their low concentration in
the soil to a zone of their higher concentration in the cells of the roots through active
absorption.
c) i). Placentation is the arrangement of ovules within an ovary. The part of the ovary where the
ovules are attached is called a placenta.
ii). ¶ Marginal placentation
¶ Parietal placentation
¶ Axile placentation
¶ Free central placentation
*Q3a*
Occurring group of different organisms living together and interacting in the same environment.
ii
Population=is defined as the total number of organisms of the same species living together in a given area
iii
Ecologicalnide==Refers to the specific portion of a habit which is occupied by a particular organism
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3b
Because all living organism need energy and nutrient in an environment in other to sustrundipe
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3c
1). Lack of enough food
2) out break of disease
3) lack of money Cii
Exposed the soil into erosion
Cause loss of nutrient into the plant
Cause low yield
6bi)
Irritability is the ability to be excited to a characteristic action or function by the application of some stimulus
Or
Irritability is the Abnormal sensitivity or excessive responsiveness, as of an organ or body part, to a stimulus.
6ci) Tillage is the agricultural preparation of soil by mechanical agitation of various types, such as digging, stirring, and overturning. Examples of human-powered tilling methods using hand tools include shovelling, picking, mattock work, hoeing, and raking
6ei) Oviparity is the expulsion of undeveloped eggs rather than live young. The eggs may have been fertilized before release, as in birds and some reptiles, or are to be fertilized externally, as in amphibians and many lower forms. In general, the number of eggs produced by oviparous species greatly exceeds the number of offspring from species that bear live young, but the chances of survival are diminished because of the lack of maternal protection.
Or
Oviparity is the producing eggs that mature and hatch after being expelled from the body, as birds, most reptiles and fishes, and the monotremes.
ii) Viviparity is the retention and growth of the fertilized egg within the maternal body until the young animal, as a larva or newborn, is capable of independent existence. The growing embryo derives continuous nourishment from the mother, usually through a placenta or similar structure.
6f)
Rhizobium turns the free Nitrogen in air into
- Ammonia
- Nitrate
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