Cell energy

Why do our muscles need more oxygen during exercise?

• To help increase the rate of photosynthesis

• To help increase the rate of cellular respiration

• To help increase the rate of combustion

Why do our muscles need to increase the rate of cellular respiration when we exercise?

• To help make more ATP energy

• To help make more glucose

• To make more sunlight energy

A student is observing what happens when they place an aquatic plant under a lamp. The student notices gas bubbles being released by the plant.

What gas do the bubbles most likely contain?

• carbon dioxide

• oxygen

• helium

Which plant has the highest rate of photosynthesis?

• Plant A

• Plant B

• Plant C

Why does plant A have the highest rate of photosynthesis?

• It receives the most sunlight

• It receives the least sunlight

• It is the smallest plant

What does this graph show?

• The height of a plant at different temperatures

• The rate (speed) of photosynthesis at different temperatures

• The temperature of a plant when oxygen is present

At what temperature is the rate of photosynthesis (or oxygen produced) the highest?

• 0 degrees Celsius

• 40 degrees Celsius

• 80 degrees Celsius

• 200 degrees Celsius

What does this graph measure?

• Rate of photosynthesis at different light intensities

• Rate of photosynthesis at different temperatures

• Rate of photosynthesis when the plant is dead

When is the rate of photosynthesis the highest?

• Light intensity of 0 lux

• Light intensity of 100 lux

• Light intensity of 250 lux