Waec 2019 Biology Past Questions And Answers
The major mineral present in the shell of Molluscs is________
- A. Copper
- B. Sodium
- C. Iron
- D. Calcium
Organisms in an ecosystem are usually grouped according to their trophic level into__________
- A. carnivores and omn
- B. consumers and parasites
- C. producers, and saprophytes
- D. Producers and consumers
The digestion of proteins starts in the______
- A. small intestine
- B. stomach
- C. large intestine
- D. mouth
The complex relationship between the members of a community and their physical environment is known as________
- A. commensalism
- B. symbiosis
- C. saprophytism
- D. ecology
Which of the following structures will NOT be found in the nucleus of a cell?
- A. DNA
- B. Nucleolus
- C. Lysosome
- D. Centriole
Tooth decay is usually caused by___________
- A. undigested and absorbed food
- B. eating a limited amount of sweetened food.
- C. the bacteria
- D. eating a lot of proteinous foods
a. Statethreefeatures of the small intestine that increase the rate of absorption of digested food. [3 marks]
b. Explainbrieflywhat happens to the glucose formed in a plant during photosynthesis. [3 marks]
c. Explainbrieflythe mode of feeding in each of the following organisms:
(i) Euglena; [4 marks]
(ii) Spirogyra. [4 marks]
d. Statethree characteristics of an Estuarine habitat. [3 marks]
e. Statethree differences between an aquatic habitat and a terrestrial habitat. [3 marks]
View Discussion (0)WAEC 2019 THEORYThe salinity of a brackish habitat________
- A. increases immediately after rainfall
- B. increases at the end of the rain
- C. decreases with an increase in the number of organisms
- D. increases during the dry season
The diagram below is an illustration of the longitudinal section of a flower. Study it and answer this question
Which part of the flower is responsible for the protection of young flower buds?
- A. I
- B. II
- C. III
- D. IV
Which of the following factors is not a source of variation in living organisms?
- A. Environment
- B. Inheritance
- C. Mitosis
- D. Meiosis