Which of the following micronutrients are required for plant growth?
sodium, nickel and chloride
copper,zinc and molybdenum
sodium,potassium and boron
carbon, hydrogen and oxygen
Which of the following element is essential for photosynthetic oxygen evolution?
iron.
gold
copper
manganese
In which of the following form, sugar is transported within the body of a plant?
sucrose
lactose
glucose
maltose
The major portion of the dry weight of plants comprises of
carbon, nitrogen and hydrogen
calcium, magnesium and sulphur
nitrogen, phosphorus and potassium
Which of the following mineral helps in nitrogen fixation?
zinc
molybdenum
magnesium
The chemical formula of carotene obtained from carrot is.
C40H56
C40H56O2
C55H72O5N4Mg
C55H70O6N4Mg
A thin film of water, held by the soil particles, under the influence of internal attractive force, is called which of the following water?
capillary
combined
hygroscopic
gravitational
Which of the following nutrients serve as macronutrients for plant growth?
C,H and O
K,N and S
Ca, Mg and P
all of these
Which of the following elements is almost non-essential for plants?
Ca
Mo
Zn
Na
The plants make glucose from
stem and root
water and oxygen
water and minerals
water and carbon dioxide
