introductory biology worksheet1

7/27/2019 Introductory Biology Worksheet1

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Independent variable:

Dependent variable:

24. If acid rain is in water, then fish population will increase.


Dependent variable:

25. If calcium is given, then bone strength will increase.


Dependent variable:

26. . John always listens to his favorite radio station, an oldies station, when hedrives his car. Every morning he listens to his radio on the way to work. On Mondaywhen he turns on his car radio, it is playing country music. Make a list of validconjectures to explain why his radio is playing different music.

27. Allison is watching her daughters Kate and Kim swim laps. She uses a stop watchto time each lap that each of them swim. What conjecture can you make using the

information in the table below?

Lap 1 2 3 4kate 30sec 31sec 31sec 30seckim 31 35 36 37

28. Ryan is playing with his Hot Wheels. He races his red dragster car against his blue convertible car 3 times using race courses of different lengths. What conjecturecan you make using the information in the table below?

Race 1 2 3Red 5 sec 4 sec 6.5 secBlue 7 sec 6.5 sec 8 sec

29. Bumblebees show some ability to control their own temperature. During coldweather they have been observed to warm up their flight muscles by shivering. Theyare able to maintain a body temperature considerably above that of the surroundingair. Based on this observation you could reasonably conclude that:

A. bumblebees are ectothermic.


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B. bumblebees maintain a constant body temperature at all times.C. shivering in bumblebees is an example of endothermy.D. changes in the body temperature of bumblebees would closely match changes inthe temperature of the external environment.

30. Hormone controlled responses generally last longer than responsescontrolled by the nervous system becauseA. hormones travel long distances around the body and nerve cells are relatively

small.B. different hormones have different actions whereas all nerve action is similar.C. hormones remain in the bloodstream for some time before being destroyed.D. hormones are generally proteins and nerve action is electrical.

31. The diagram represents a model of the biological control system involved in body temperature regulation.

If stimulus X was a lowering of core body temperaturea. name the location in the body where you would find receptor Y.

_______________________________________________________________________ __

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b. i. Name an effector that would bring about a physiological response to stimulus X. _______________________________________________________________________ __

1 mark

ii. Describe how the effector that you have named in part i. brings about a responsethat alters the stimulus. 2marks.

32. Review the homeostatic control of body temperature and summarize this in aflow diagram.

introductory biology worksheet1

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