IV. MULTIPLE CHOICE:
Write the letter of the correct answer in the blank before each number.
1. The male butterflies release a dust of microscopic sexual stimulant to the
female. What is this stimulant called?
A. Stimulator
C. Pheromones
B. Activators
D. Reproductor
2. How are the pollens from the anthers of one flower transfer to the stigma
of another flower?
A. by wind
B. by insects C. by the sun D. by A and B
3. What is the reproductive mechanism of ferns, mosses, and fungi?
A flower
B. sori
C. spores
D. roots
4. What is an Estuary?
A. The land area that drains water into a lake, river, or pond.
B. The area where the river meets the ocean, fresh water and salt water mix.
C. The large body of salt water covers most of the Earth's surface.
D. The underground system that provides drinking water to an area.
5. Why are Estuaries important?
A. They help to filter pollutants from the waters.
B. They serve as the breeding ground of many ocean fish,
C. They stabilized and protect the coastal areas.
D. All of the above.
____6. Which is the shallowest part of the ocean ecosystem where the ocean is
covered and uncovered as tide goes in and out?
A. Economic zone
C. Intertidal zone
B. Ocean
D. Convergence zone
7. Which of the following can harm the Estuaries?
A. Urban development
C. Agricultural Activities
B. Littering
D. All of the above
8. Many migratory birds come and feed on mud flats, when is the best time
for the bird to catch fish and invertebrates?
A. During tidal ebb
C.During tidal flow
B. During the storm
D. During the flood
9. How can we protect our Ecosystem in Estuaries?
A. Practice improper disposal of wastes.
B. Throw factory wastes in rivers and seas
C. Observe the Pollution preventive measures in the area
D. Practice illegal ways in Fishing
10. What is the process by which pollen is transferred in plant?
A. germination
C pollination
B. ovulation
D. respiration​