Question
Describe the model of phosphorus cycle in the terrestrial ecosystem.
✓
Answer
Phosphorus a major constituent of biological membrane/ nucleic acids/ cellular energy transfer system, Many animals need it for making shells/ bones and teeth, the natural reservoirs of phosphorous is rock, which contains phosphorous in the form of phosphate reserves, on weathering minute amount of phosphate dissolve in soil solution, and absorbed by roots, Herbivores, obtain these elements from plants waste products and dead organism, decomposed by phosphate-solubilising bacteria, releasing phosphorus. Marks can also be awarded for the steps given in the proper sequence, with other details,
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Describe the post-zygotic events leading to implantation and placenta formation in humans. Mention any two functions of placenta.
OR
- Briefly explain the events of fertilisation and implantation in an adult human female.
- Comment on the role of placenta as an endocrine gland.
During the biology class on theories of evolution, the teacher was telling about Lamarckism. Katy was confused after listening to it and went to her teacher to clear her doubts. She asked if characters can be passed to generations, then why she does not have the tatoo that her mother has on her arm. The teacher smiled and told Katy that this is the reason why Lamarck's theory was rejected. The teacher explained her the other theories as well.
- Name the book in which Lamarckism was explained.
- What are the three factors of this theory?
- What are the other theories of evolution?
- What are the values shown by teacher?
- List any four evidences of evolution.
- Explain any one of the evidences that helps to understand the concept of evolution.
What are the various advantages of using genetically modified plants to increase the overall yield of the crop?
With the help of a diagram explain the structure of DNA.
Answer the following questions:
You are given tall pea plants with yellow seeds whose genotypes are unknown. How would you find the genotype of these plants? Explain with the help of cross.
You are given tall pea plants with yellow seeds whose genotypes are unknown. How would you find the genotype of these plants? Explain with the help of cross.
The following is the illustration of the sequence of ovarian events (a – i) in a human female.
Explain the process of replication of a retrovirus after it gains entry into human body.
- What is an age pyramid?
- Explain with the help of figures, the three different types of age pyramids represented by human population.
Describe in detail the development of male gametophyte in angiosperms with well labelled diagram.