GCSE Combined Science: Trilogy - Biology Paper 1F

Flashcards based on biology exam questions, focusing on key concepts and definitions.

The gas produced by pondweed in the light is .

oxygen

A student could change the _ of light reaching the pondweed to investigate the rate of photosynthesis.

intensity

The student could measure the _ of photosynthesis by measuring the amount of gas produced over a certain amount of time.

rate

Light is a _ factor at 200 lumens.

limiting

Besides light intensity, another factor that affects the rate of photosynthesis is _.

temperature, carbon dioxide concentration, or water availability

Oxygen enters a single-celled organism through _.

diffusion

In the lungs, _ passes from the alveolus into the blood.

oxygen

In the lungs, _ passes out of the blood into the alveolus.

carbon dioxide

The part of the blood that carries the most oxygen is _.

red blood cells

From smallest to largest: cell, nucleus, organ, _.

tissue

An example of an animal organ is _.

heart, lung, brain etc

_ is a plant tissue.

phloem

_ hair cells do not contain chloroplasts.

root

Water is lost from the leaves of a plant through stomata by the process of _.

transpiration

A _ cell surrounds the stomata.

guard

Temperature was the variable in the plant mass investigation.

independent

The student sealed a plastic bag around the pot to prevent water loss from the _.

soil

In the digestion model, the partially permeable tubing represents the _.

small intestine

In the digestion model, the water in the test tube represent the _.

blood

The enzyme that digests starch in the human digestive system is _.

amylase