Which of the following is a micronutrient required for nitrogen fixation in legumes?
Magnesium
Calcium
Molybdenum
Potassium
Related Questions
Which mineral ion is involved in the opening and closing of stomata?
Calcium
Magnesium
Potassium
Iron
Mycorrhizae aid in mineral uptake primarily by increasing the:
Rate of photosynthesis
Rate of transpiration
Surface area for absorption
Concentration of minerals in the soil
The initial uptake of mineral ions by root hairs is primarily through:
Active transport
Diffusion
Osmosis
Bulk flow
What is the most efficient region of water absorption in roots?
Root cap
Growing point
Zone of elongation
Zone of differentiation
Unlike facilitated diffusion, active transport:
Does not require energy
Occurs down a concentration gradient
Uses protein channels
Requires energy
Which of the following is essential for the active uptake of mineral ions?
Water
Sunlight
ATP
Carbon dioxide
The initial step in the uptake of mineral ions by root cells involves:
Active transport into the symplast
Passive absorption into the apoplast
Translocation through the phloem
Transport into the xylem
A researcher is studying the uptake of iron (Fe) by plant roots. They observe that the process is significantly inhibited by the presence of respiratory inhibitors. Which of the following best explains this observation?
Iron uptake is a passive process driven by diffusion.
Iron uptake is facilitated by anaerobic respiration.
Iron uptake is coupled with the release of oxygen.
Iron uptake is an active process requiring energy from respiration.
Which of the following processes requires energy to transport ions from a region of lower concentration to a region of higher concentration across a membrane?
Simple diffusion
Facilitated diffusion
Osmosis
Active transport
Plant obtain carbon and most of their oxygen from
Soil
Water
from the atmosphere
Symbiotic organisation
