Science yr9 2026!

So I don't failllllllllllllllllllllllllllllllll!

nucleus

This controls what happens in the cell. It contains DNA, the genetic information that cells need to grow and reproduce.

cytoplasm

This is a jelly-like substance in which chemical reactions happen.

mitochondria

This is the structure in the cytoplasm in all cells where aerobic respiration takes place and where most energy is released in

cell membrane

This surrounds the cell and allows nutrients to enter and waste to leave it

cell wall

This is an outer structure that surrounds plant cells and gives it support

vacuole

This is a space within the cytoplasm of plant cells that contains sap

chloroplast

This contains chlorophyll, where plants carry out photosynthesis

MRS C GREN stands for what?

Movement, respiration, sensitivity, cells, growth, reproduction, excretion, nutrition

Plant and animal cells both contain?

Cell membrane, nucleus, cytoplasm, mitochondria

What 3 components do plant cells have that animal cells do not?

Large vacuole, chloroplasts, cell wall

Why do onion cells and other root cells not have chloroplasts?

Because a onion is the result of the chloroplast in the mother plant, and grows underground.

Word equation for photosynthesis?

Carbon dioxide + water →sun & chlorophyll →oxygen + glucose

Proper (complex) chemical equation for photosynthesis?

6CO2 + 6H2O → chlorophyll & light → C6H12O6 + 6O2

Meaning of annual plants

plant that takes one year to complete their life cycle

Meaning of biennial plants

plant that takes two years to complete their life cycle, germinating and growing roots and leaves in their first year, flowering, setting seed and dying in their second year.

Meaning of perennial plants

plant that lives for several years after germination

Meaning of monocarpic plants

plant that will produce seeds only once, but may take several years to grow to maturity. The Talipot Palm may live for 60 years or more before it produces flowers and seeds, and. it then dies.

What do plants need in order to germinate?

water, oxygen and warmth

What is the male part of the flower called?

the stamen

What is the female part of the flower called?

the pistil/carpel

What is a gamete?

a sex cell

What is pollen?

plants sex cells

Function of the petals?

To protect the delicate reproductive organs (pistils and stamens). Petals are modified leaves.

Function of a anther?

To produce, house, and release pollen grains

Function of a filament?

To support and elevate the anther to facilitate pollination.