N: Taster... E
07487_1_...
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)

Will mark brainliest i only need the ! 1.use ten beads and a centromere of one color to construct the long chromosome. use ten beads and a centromere of a second color to construct the second chromosome in the long pair. make a drawing of the chromosomes in the space below. 2. for the second pair of chromosomes, use only five beads. 3. now model the replication of the chromosomes. make a drawing of your model in the space below. part b: meiosis i during meiosis i, the cell divides into two diploid daughter cells. 4. pair up the chromosomes to form tetrads. use the longer tetrad to model crossing-over. make a drawing of the tetrads in the space below. 5. line up the tetrads across the center of your “cell.” then model what happens to the chromosomes during anaphase i. 6. divide the cell into two daughter cells. use the space below to make a drawing of the result. part c: meiosis ii during meiosis ii, the daughter cells divide again. 7. line up the chromosomes at the center of the first cell, one above the other. separate the chromatids in each chromosome and move them to opposite sides of the cell. 8. repeat step 7 for the second cell. 9. divide each cell into two daughter cells. use the space below to make a drawing of the four haploid cells

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