Cell Organisation
This type of organism consists of a single cell that carries out all life processes.
What is a unicellular organism?
This organ is the primary site of photosynthesis in most plants.
What is a leaf?
These organisms make their own organic molecules from inorganic substances.
What are autotrophs?
These tiny pores in leaves allow gases to enter and leave the plant.
What are stomata?
This transport medium carries oxygen, nutrients, hormones and wastes in mammals.
What is blood?
This type of organism is made up of groups of similar cells that live together but are not highly specialised.
What is a colonial organism?
This organelle contains chlorophyll and is responsible for photosynthesis.
What is a chloroplast?
Animals are classified as this type of organism because they obtain nutrients by consuming other organisms.
What are heterotrophs?
These microscopic air sacs provide a large surface area for gas exchange in mammals.
What are alveoli?
In this type of circulatory system, blood remains enclosed within vessels.
What is a closed circulatory system?
This process allows cells with the same DNA to develop different structures and functions.
What is cell differentiation?
This vascular tissue transports water and dissolved minerals from the roots to the leaves.
What is xylem?
This enzyme begins the digestion of starch in the mouth.
What is amylase?
This process causes oxygen and carbon dioxide to move across gas exchange surfaces.
What is diffusion?
Insects possess this type of circulatory system.
What is an open circulatory system?
This level of organisation is made up of groups of similar cells working together to perform a specific function.
What is a tissue?
This vascular tissue transports the products of photosynthesis around the plant.
What is phloem?
Most nutrient absorption occurs in this organ.
What is the small intestine?
Fish use these structures to extract oxygen from water.
What are gills?
As blood passes through body tissues, the concentration of this substance decreases because it is used in cellular respiration.
What is oxygen?
Arrange these levels of organisation from smallest to largest: organelle, system, organ, tissue, cell, organism.
What is organelle → cell → tissue → organ → system → organism?
This theory explains how water moves through xylem due to cohesion, adhesion and transpiration.
What is the transpiration-cohesion-tension theory?
These finger-like structures increase the surface area available for nutrient absorption.
What are villi?
Name three adaptations of efficient gas exchange surfaces.
What are a large surface area, thin exchange surface and concentration gradient (or good blood supply/ventilation)?
Compare the composition of blood entering and leaving the small intestine after a meal.
What is blood leaving the small intestine contains higher concentrations of absorbed nutrients (such as glucose and amino acids) than blood entering it?