Growth 📈

• How can growth be recorded?

  They can be recorded overtime by taking measurements such as length or mass or head circumference.
• What is cell differentiation?

  It is when an unspecialised cell differentiates to become a specialised cell.
• What are growth charts and what do they show?

  growth patterns.
• Give an example of a growth chart.


  This --->

  
• What is a sperm cell and its function?

  Male reproductive cell and fertilizes the egg cell.
• What are the adaptations of a sperm cell?

  Flagellum- to allow it to swim to the egg cell.

  Acrosome- which contains a digestive enzyme for sperm to penetrate an egg cell.

  Middle piece- packed with mitochondria to release energy when needing to swim and fertilise the egg.

  It is a haploid (23 chromosomes)
• What is an egg cell and its function?

  Female reproductive cell and to fuse with a sperm cell during fertilization to create a new organism.
• What are the adaptations of an egg cell?

  Cytoplasm- contains lots of it which has nutrients for the growth of the early embryo.

  Zona Pellucida- outer jelly coat of egg cell to prevent more than one sperm cell from entering.

  It is a haploid (23 chromosomes)
• How do you measure growth in plants?


  Height, leaf surface area, biomass.
• What is the calculation to figure out growth in plants?

  Final value - initial value

  ------------------------ x 100

  Initial value
• What are meristems?


  They are a group of cells near the end of each shoot and root that allow plants to continue growing throughout their lives.
• Give two examples of specialised cells?

  Root hair cells- found on the surface of roots and they absorb water and dissolved nutrients from soil. They have a large surface area which increases the rate of absorption.

  Palisade cells- Found in leaf near top surface. It is where most photosynthesis is carried out and contains many chloroplasts.
• What is elongation?


  The process by which plants become longer when growing through the plant hormone auxin.