Biology Year 8 - Photosynthesis and Ecology

What is the function of the chloroplasts in a leaf cell?

• To create energy in respiration

• To release energy in respiration

• To absorb energy from light for photosynthesis

• To create energy

What is the name of the holes on the bottom of a leaf?

• Mitochondria

• Stomata

• Ribosomes

• Chloroplasts

What type of cell controls water loss through the stomata of a leaf?

• Guard cell

• Queen cell

• King cell

• Control cell

Which one is an adaptation of the cells of the palisade layer of a leaf?

• They have lots of mitochondria

• They have air spaces between them

• They are found at the bottom of the leaf

• They are tightly packed together

Which one is an adaptation of the cells in the spongy mesophyll layer of a leaf?

• They have lots of mitochondria

• They have air spaces between them

• They are found at the top of the leaf

• The cells are tightly packed together

Complete the word equation for photosynthesis:

carbon dioxide + water -> oxygen + ?

(a)  

Which number makes the symbol equation for photosynthesis balanced?

?CO₂ + ?H₂O -> ?O₂ + C₆H₁₂O₆

(a)  

What is the scientific word for the organism at the start of a food chain?

• Predator

• Prey

• Producer

• Consumer

What type of organisms are producers?

• Rocks

• Plants

• Animals

• Humans

How does a producer get its energy if it doesn't eat?

• Carbon dioxide in the air

• Water

• The soil

• From light