Which statement correctly defines herbicides?
- Herbicides are used to control insect pests.
- Herbicides are substances designed to prevent, inhibit, or kill weed plants.
- 2,4-D is an example of a rodenticide.
A2 only
BNone of these
C2, 3
D1 only
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Related Questions:
Regarding nematicides, which statement is accurate?
- Nematicides are used to control weeds and invasive plant species.
- Nematicides are substances that prevent, repel, or control nematodes.
- Nematicides are primarily used to sterilize insect pests.
കേന്ദ്ര മലിനീകരണ നിയന്ത്രണ ബോർഡിൻ്റെ ആസ്ഥാനം ?
What process involves the downward movement of pesticides through the soil, facilitated by rainwater or irrigation water?
- Leaching describes the downward movement of pesticides through the soil profile.
- Absorption is the process of downward soil movement of pesticides.
- Volatilization is the downward movement of pesticides in soil.
- Runoff is the process of downward pesticide movement in soil.
Which of the following statements about heavy metal uptake by plants is correct?
- Vegetables like brinjal, gourd, spinach, coriander, tomato, and pumpkin are susceptible to heavy metal uptake by their roots.
- Heavy metals are not absorbed by the roots of plants.
- Heavy metals are only absorbed by the leaves of plants.
- Plants can effectively remove heavy metals from the soil without any risk.
ജലത്തിലെ ജൈവ മാലിന്യത്തിന്റെ അളവ് കൂടുന്തോറും, ബയോളജിക്കൽ ഓക്സിജൻ ഡിമാൻഡ് ___________