Question

High C/N ratio produces
A. Softer tissues
B. More mechanical tissues
C. More growth hormones
D. Growth inhibitors

Answer 1

Hint: C/N ratio is the mass of carbon to mass of nitrogen ratio. The C/N ration for marine sources is 4-10:1. Terrestrial sources have a greater C/N ratio.

Complete Answer:
Carbon and nitrogen are the most important biomolecules present in the living cell. Carbon is the main constituent of all the membranes and enzymes. It is also an energy producing molecule.
- Nitrogen is the backbone of the genetic material i.e. DNA and RNA. The ratio of carbon and nitrogen helps us to determine whether the plant is land based or algal based depending on the photosynthesis they undergo.
- It also helps us to find out the sources of sedimentary matter which can provide information regarding ecology, climate, etc.
- If the ratio of C/N is high it will lead to synthesis of more mechanical tissues in vascular plants. This is due to more acid content and less methane. The plants will also have more roots.
- Softer tissues: They are composed of parenchyma cells. Soft tissues include fruits, seeds, leaves, and stems.
- More growth hormone: Auxins are the most important growth hormone.
- Growth inhibitors: Abscisic acid is an important growth inhibitor.

The correct answer is (B). High C/N ratio produces more mechanical tissues.

Note: The carbon and nitrogen are left behind after the decay of the animal or plant body. The carbon is used up by the decomposers whereas the nitrogen is left behind in the soil which is further absorbed by the other organisms for the growth.