Question
Describe briefly :
Sigmoid growth curve
Sigmoid growth curve
✓
Answer
Sigmoid growth curve: Keeping the factors affecting the growth rate the same, if we measure the growth of cells (plant parts) or the entire plant, then we see that their rates are not the same. If a graph of growth rate is made with time then an S-shaped or sigmoid graph is formed. This is called growth curve. This entire growth arc can be divided into four parts
(i) Lag period: This is the initial stage of growth in which growth occurs at a slow pace.
(ii) Maximum growth period (Log or exponential period): At this time maximum growth occurs at a rapid pace.
(iii) Deaccelerating period: During this period the rate of growth in plants slows down again.
(iv) Stationary period: There is no growth in plants during this period.
(i) Lag period: This is the initial stage of growth in which growth occurs at a slow pace.
(ii) Maximum growth period (Log or exponential period): At this time maximum growth occurs at a rapid pace.
(iii) Deaccelerating period: During this period the rate of growth in plants slows down again.
(iv) Stationary period: There is no growth in plants during this period.
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
Amrita and her mother planted small seedling of plant in the soil in their garden. After few months, while playing with her friends Amrita observed that the seedlings which they planted had grown into a mature and flourishing plant. Amrita was curious to know this and asked her mother about this.
- Name the process that causes growth in living organisms.
- Discuss about the process that how growth occurs in living organisms.
- Analyse and write about the common sites of mitosis in plants as well as in animals.
- What values were shown by Smita?
Give comparison between the following:
Anatomy of leaf in C3 and C4 plants
Anatomy of leaf in C3 and C4 plants
Mention any four activities regulated by the estrogen hormone.
OR
List any four effects produced by estrogen.List out any six general features of cartilaginous fishes.
Sino-atrial node is called the pacemaker of our heart. Why?
Biology teacher was teaching cell cycle in the class. She taught that cell is the basis from which life exists. Also explained well about cell cycle. Robin who was a bright student was facing difficulties in understanding the topic he reached home and asked her sister who is a student of biology in a college about details of cell cycle and cell theory. She explained him that according to cell theory, cells arise from pre-existing cells and the process involved is cell division. Sexually reproducing organisms start their life from a single cell, called zygote, and cell divisions do not stop with the formation of a mature organism, but continue throughout the life.
- What is meant by cell cycle?
- Which is the actual phase of cell division?
- When (at what phase) do the cell organelles duplicate?
- What values are reflected from the Robin's concern?
How is secondary growth accomplished in dicot roots? Explain with the help of schematic diagrams.
What is hemodialysis? Describe the various stages of its process.
Pyruvic acid is the end product of glycolysis. What are the three metabolic products of pyruvic acid produced under aerobic and anaerobic conditions? Write their name in the space provided in the diagram.
Represent schematically the pathway of fermentation of lactic acid.