1988Which of the following specialized structures are stimulated by touch, pressure, pain, heat and cold?See more
1988In a water culture experiment a plant showed poor growth and yellowing of the leaves. These symptomsWere probably due to the absence ofSee more
1988Which of the following is not regarded as a micro-nutrient or trace element for plant growth?See more
1988Even though some flowering plants contain accessory pigments which give them colours they still containThe pigmentSee more