12. You take a sample of the kidney tissue of an arvark cells. After staining an

Question

12. You take a sample of the kidney tissue of an arvark cells. After staining and sorting the chromosomes, you coum.omosomes for chromosomes. You conclude that twenty is the this species, and would expect that their gametes would have of an aardvark and examine the chromosomes count A. Diploid, 20 B. Diploid, 10 C. Haploid, 20 D. Haploid, 10 Use for questions #13 & # 14: You conduct an experiment on heart rate and exercise. ril subjects receive 1 of 4 possible treatments: standing, walking 1.5 mph, brisk walking 3 mph, or jogging at 4.5 before and after the treatment. mph for ten minutes. You measure their heart rate 13. In this example experiment, the heartbeat after the treatment is the: A. Response (dependent) variable B. Experimental (independent) variable C. Placebo D. Control variable 14. You had hypothesized that the more intense the activity, the greater the increase in heart rate would be. The average increase in heart rate for each treatment is as follows: Standing: 2 bpm (beats per minute) Walking: 10 bpm Brisk Walking: 17 bpm Jogging: 26 bpm What would you conclude for your experiment? A. Hypothesis was proven B. Hypothesis was supported C. Further experiments are needed D. Hypothesis should be rejected 15. ATP can be used by cells to do which of the following tasks? A. Chemical work B. Mechanical work C. Transport work D. All of the above s is the ATP-requiring process of moving a molecule against its concent gradient: A. Passive transport B. Osmosis C. Active transport D. Facilitated transport

Explanation / Answer

12. Option B) Diploid,10 is the correct choice. Also, all the cells of in body are diploid except gametes. Since gametes are haploid in sexually reproducing animals to restore the genetic balance, gametes will have 10 chromosomes.

13. Heartbeat is the response variable (option A) as it depends on nature of activity i.e. merely standing or jogging etc.

14. Option B) Hypothesis was supported is the correct choice as heart rate increased in treatment of intense activity.

15. Option D) All of the above. ATP is the energy currency of cell and can be hydrolyzed to perform all these tasks.

16. The correct choice is C) Active transport.

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