B2 Topic 3 Growth & Development Flashcards

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0
Q

How can you measure growth in an organism

A

Size- measure height length width
Wet mass- we contain lots of water and our weight depends on water retention. This is our mass including water.
Dry mass- mass with no water in body. Only done when dead.

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1
Q

What is growth

A

An increase in size or mass

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2
Q

Plants and animals grow due to the following processes

A
Cell differentiation (cell becomes specialised)
Cell division (mitosis)
Cell elongation (plant cell expands-grow)
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3
Q

What processes do animals grow by?

A

Cell division as we grow when young and stop when we become adult as cell division no longer for growth but repair. (cell differentiation also lost at young age)

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4
Q

What process do plants grow by?

A

Cell elongation as plants grow continuously. They differentiate to form new parts and cell division happens in roots shoots only.

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