Waec Agricultural Science 2019 Past Questions and Answers

Question 36:

• WAEC 2019

A biotic factor affecting agricultural production is?

A. Rainfall
B. Predator
C. Humidity
D. Temperature

Question 37:

• WAEC 2019

Which of the following groups of organisms are parasites plants?

A. Nematode, fungus and bacterium
B. Striga, nematode and dodder
C. Dodder, fungus and striga
D. Mistletoe, fungus and bacterium

Question 38:

• WAEC 2019

The type of rock formed from accumulation of materials transported by water is called?

A. Sedimentary rock
B. Igneous rock
C. Metamorphic rock
D. Plutonic rock

Question 39:

• WAEC 2019

A fresh garden soil sample weighed 25kg. When oven-dried, its weight reduced to 20kg. Calculate the percentage moisture content of the soil sample.

A. 5.0%
B. 12.5%
C. 20.0%
D. 25.0%

Question 40:

• WAEC 2019

Which of the following mineral elements is essential for chlorophyll formation?

A. Calcium
B. Boron
C. Sodium
D. Magnesium