Easy 659 likes

Question

Among nitrobacter, rhizobium, nitrosomonas, nitrite bacteria, pseudomonas — which one is found in the fourth phase of the nitrogen cycle?

(a) Rhizobium

(b) Nitrosomonas

(c) Nitrobacter

(d) Pseudomonas

WBBSE Class X Life Science 05 (a) Nitrogen 01 Mark 2025

Answer

(d) Pseudomonas

Explanation:

The fourth phase of the nitrogen cycle is denitrification, where nitrate is converted to nitrogen gas by denitrifying bacteria. Pseudomonas is an example of denitrifying bacteria involved in this process.

Related Questions

More WBBSE Easy level questions

1/12
Easy
Q. Prepare a list of diseases linked with pollution as observed by a doctor among her...
A. Pollution causes respiratory, skin and other diseases via air, water toxins. A...
Easy
Q. Write one function each of the following five parts of eyeball of human eye: (a)...
A. Parts Functions (a) Cornea Refracts light rays entering the eye. (b) Lens...
Moderate
Q. Prepare a list of animals being endangered by poaching. Which environmental factors have the potentialities...
A. Animals endangered due to poaching Poaching for skin, fur, horns, tusks, bones,...
Hard
Q. What is the role of cryopreservation in the conservation of biodiversities? What information may be...
A. Cryopreservation is a method of ex-situ conservation in which living biological materials...
Moderate
Q. Explain the relationship between the decline in the number of biodiversities with that of over-exploitation...
A. Relationship: Over-exploitation refers to the excessive use of biological resources beyond their...
Moderate
Q. Show the major events of evolution with the help of a chart. What are the...
A. The major events of evolution with the help of a chart Roles...
Moderate
Q. Write three inferences deduced from the observations as mentioned in Darwin’s theory of origin of...
A. Observation Inference Prodigious reproduction There is a struggle for existence due to...
Moderate
Q. Black-smooth hair is produced in F₂ generation resulting from a cross between pure black-rough haired...
A. Genetic counselling detects carrier status in parents for autosomal recessive diseases like...
Moderate
Q. Mention the dominant and recessive traits of two characters related with seed and one character...
A. Here are two seed-related characters commonly used in Mendel’s experiments, showing their...
Moderate
Q. How is micropropagation performed? Which phenomena occur during telophase stage of mitosis in an animal...
A. Micropropagation is rapid vegetative multiplication using tissue culture technique.​ It is performed...
Moderate
Q. Establish the interrelationship between gene, DNA and chromosome. What are the advantages of vegetative propagation?
A. Chromosomes are the gene-bearing nucleoprotein filaments present within the nucleus, endowed with...
Moderate
Q. Describe the following features occurring during anaphase stage of animal cell division: (a) Division of...
A. Anaphase ensures equal chromosome distribution. (a) Centromere divides longitudinally into two. (b)...