Mineral nutrition practice · Mixed difficulty

What is the major function of air stone?

In case of Nitella, ${H_2}O$,${O_2}$,$C{O_2}$ and Na follows

Addition of chelating agent to hydroponics is necessary for

Which of the given prokaryotes fixes nitrogen symbiotically as well as in free living state?

Plants growing near the nuclear test sites take up and accumulate which of the following elements?

Read the given statements and select the correct option.

A. Deficiency symptoms of calcium first appear in younger leaves.

B. Excess of Mn causes reduction in uptake of $\mathrm{Mg}$ and $\mathrm{Fe}$.

The plant ash indicates

The deficiencies of micronutrients not only affects growth of plants but also vital functions, such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport?

Chlorosis in plants is generally due to deficiency of

Potassium is required by which of the following regions of plants
I. Meristematic tissues II. Buds
III. Leaves IV. Root tips

Critical concentration is the concentration of

Aeroponics are

Which of the following is not caused by deficiency of mineral nutrition

Necrosis means

In root nodules of legumes, leghaemoglobin is important because it

Enzyme nitrogenase is responsible for

Choose the correct options

Micronutrients are

Which of the following is not caused by deficiency of mineral nutrition –

Which of the following statements is incorrect?

The number of essential elements known for the growth and reproduction of plants is

Which of the following nutrient is required for auxin synthesis?

A small aquatic plant was put in each of the petri dishes- X, Y and Z, containing different culture solutions. After six weeks, the plant in dish-X had the same number of leaves as it had previously and were all small and yellowish. Plant in dish-Y had more leaves of normal size and dark green colour. Plants in dish-Z had more leaves of normal size but very pale. Which of the following show the elements missing the culture?

For the uptake of ions in the second phase of absorption of minerals, the pathway followed is called

Statement I: The entry of ions to the symplast is an active process while exit from it is passive

Statement II: The movement of ions into the apoplast occurs through the trans-membrane proteins

On the basis of symptoms of chlorosis in leaves, a student inferred that this was due to the deficiency of nitrogen. This inference could be correct only if we assume that yellowing of leaves appeared first in

Which one of the following is an amide involved in nitrogen assimilitaion by plants?

Which element is required for the germination of pollen grains?

If by radiation all nitrogenase enzymes are inactivated, then there will be no

Statement I: Nitrogen is a limiting nutrient in agriculture ecosystem but not is case of natural environment due to its abundance in the atmosphere.
Statement II: In nature, while lighting provides enough energy for nitrogen fixation same is not true for UV rays.