Question
Define ‘zero population growth rate’. Draw a age pyramid for the same.
✓
Answer
When the population of a location neither grows, nor declines, this shows zero population growth rate. The following pyramid shows a population with zero growth rate.
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
Bacteria cannot be seen with the naked eyes, but these can be seen with the help of a microscope. If you have to carry a sample from your home to your biology laboratory to demonstrate the presence of microbes under a microscope, which sample would you carry and why?
Gene flow occurs through generations and can occur across language barriers in humans. If we have a technique of measuring specific allele frequencies in different population of the world, can we not predict human migratory patterns in pre-history and history? Do you agree or disagree? Provide explanation to your answer.
Diagrammatically represent the experimental steps in cloning and expressing an human gene into a bacterium like E. coli ?
Suggest four important steps to produce a disease resistant plant through conventional plant breeding technology.
Arrange the following primates in correct sequence of evolution to man-
- Dryopithecus.
- Australopithecus.
- Homo erectus.
- Homo habilis.
- Homo sapiens.
- Cro-Magnon man.
- Ramapithecus.
What are transgenic bacteria? Illustrate using any one example.
List five growth conditions that a bioreactor should provide for obtaining the desired product?
Write a short note on infertility.
A tRNA is charged with the amino acid methionine:
- At what site in the ribosome will the tRNA bind?
- Give the anticodon of this tRNA.
- What is the mRNA codon for methionine?
- Name the enzyme responsible for this binding.
In Snapdragon, A cross between true breeding red flower (RR) plants and true breeding white flower (rr) plants showed a Progeny of plants with all pink flowers.
- The appearance of pink flowers is not known as blending. Why?
- What is the phenomenon known as?