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Topic:
Ecosystem & Environment
Question:
The grasslands in tropical climates that have woody trees are called?
Options:
- Prairies
- Savanna
- Pampas
- Alpine
Correct Answer:
Savanna
Explanation:
A savanna is a grassland ecosystem characterized by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to support an unbroken herbaceous layer consisting primarily of grasses.
Topic:
Digestion
Question:
Which of these is a function of saliva?
Options:
- Moistening and Lubrication
- Antisepsis and stabilization of pH
- Carbohydrate digestion
- All of above
Correct Answer:
All of above
Explanation:
Main functions of saliva are:
Mucus causing moistening and lubrication,
Sodium bicarbonate causing antisepsis and pH stabilization
Amylase causing carbohydrate digestion
TOPIC:
Cell Biology
QUESTION:
Which of the following is the function of lysosomes?
OPTIONS:
- Phagocytosis
- Autophagy
- Enzyme secretion for extracellular digestion
- All of the above
CORRECT OPTION:
All of the above
EXPLANATION:
Lysosomes performs all these functions.
Phagocytosis is eating process of a cell.
Autophagy is self-eating of worn out parts of the cell e.g mitochondria.