L&E Lab Exam - Questions With Insightful Solutions
The students want to improve the validity of their conclusion. The best way to
accomplish this is to Correct Answer - Repeat the investigation several
times
A student lifted weights after school and found that his muscles started to
burn. he couldn't continue to lift the weights after prolonged exercising. This
muscle fatigue is most likely due to Correct Answer - lack of oxygen and
build up of waste in the muscle
The build up of waste products in muscle cells that are active might cause
Correct Answer - increased fatigue
What is an advantage of a change in pulse rate after exercising? Correct
Answer - an increased blood flow carries excess waste products away from
the active muscles cells
In an experiment to determine the effect of exercise on pulse rate a student
checks his pulse rate before and after exercising for several minutes. The
purpose of checking his pulse rests before exercising is that it Correct
Answer - serves as a control for the experiment
a student filled a dialysis tube with 97% water solution and sealed he end. The
tube and its contents had a mass of 55 grams. The student placed the tube in a
solution and the mass of the tube and is contents increased to 60 grams. Into
which solution was the dialysis tube placed? Correct Answer - 99% water
which term correctly identified the process by which molecules move through
the dialysis tube membrane? Correct Answer - diffusion
The extremes of dry and wet weather of the Galapagos islands causes the food
supply to constantly change during the dryer years The food is mainly large
hard seeds and finches with large beaks are found in greater numbers. which
statement best explains this observation? Correct Answer - large beak size
is a adaptation to dry conditions
The first species of finches to inhabit The Galapagos islands thousands of
years ago was most likely an insect eater. today, Finch species on these islands
The students want to improve the validity of their conclusion. The best way to
accomplish this is to Correct Answer - Repeat the investigation several
times
A student lifted weights after school and found that his muscles started to
burn. he couldn't continue to lift the weights after prolonged exercising. This
muscle fatigue is most likely due to Correct Answer - lack of oxygen and
build up of waste in the muscle
The build up of waste products in muscle cells that are active might cause
Correct Answer - increased fatigue
What is an advantage of a change in pulse rate after exercising? Correct
Answer - an increased blood flow carries excess waste products away from
the active muscles cells
In an experiment to determine the effect of exercise on pulse rate a student
checks his pulse rate before and after exercising for several minutes. The
purpose of checking his pulse rests before exercising is that it Correct
Answer - serves as a control for the experiment
a student filled a dialysis tube with 97% water solution and sealed he end. The
tube and its contents had a mass of 55 grams. The student placed the tube in a
solution and the mass of the tube and is contents increased to 60 grams. Into
which solution was the dialysis tube placed? Correct Answer - 99% water
which term correctly identified the process by which molecules move through
the dialysis tube membrane? Correct Answer - diffusion
The extremes of dry and wet weather of the Galapagos islands causes the food
supply to constantly change during the dryer years The food is mainly large
hard seeds and finches with large beaks are found in greater numbers. which
statement best explains this observation? Correct Answer - large beak size
is a adaptation to dry conditions
The first species of finches to inhabit The Galapagos islands thousands of
years ago was most likely an insect eater. today, Finch species on these islands
