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Q3.
Some students investigated how exercise affects heart rate
The figure below shows their results.
120
110
Heart rate 100
in beats
7 of 16
per minute 90
80
70
Student A
Student B
60
0
2
4
14
16
6 8 10 12
Time in minutes
(a)
What was Student B's resting heart rate?
Resting heart rate =
beats per minute
(1)
(b)
The students started running at 2 minutes.
What evidence for this is in the figure above?
(1)

Which part of the neuron below is indicated by the arrow, and what is its function? hormones send chemical signals throughout the body to regulate other body processes. hormones are chemical signals that are sent throughout the body to regulate other body processes. hormones send electrical signals throughout the body to regulate other body processes. hormones are electrical signals that are sent throughout the body to regulate other body processes.

Which feature of a human community is similar to a niche in a biological community

What type of graph presents information about how often certain or traits occur?