Which of the following is a food chain in this web?
What is the source of energy for the grass?
Which diagram shows the pyramid of numbers for this food chain?
What could have caused these effects?
What is the effect on soil nutrients and soil erosion?
To which vertebrate group does it belong?
Use the key to identify the animal.
What is a main function of X?
Which line correctly shows the path that was taken by a pollen tube to an ovule?
What are the genotypes of the offspring?
Which position on the graph corresponds to the point at which the ribs are beginning to be
Which graph shows the rate and depth of breathing of the same person immediately after a
period of exercise?
How many of these arthropods are insects?
Which process is taking place at X?
In which experiment will the seeds germinate most quickly?
Which is the lag phase in the growth of this population?
Which labelled structures are found in plant cells but not in animal cells?
Which feature indicates that it is a palisade cell?
Which part would contain the breakdown products of bacterial cells?
What takes place?
What happens and why?
Which nutrient is a protein?
Why is it a good idea to brush teeth after eating?
What type of cell is shown?
Which feature is not common to all of these cells?
What should be used to kill the weeds?
What is this an example of?
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