Question

1. when someone is out in the cold and their body temperature starts to drop, they will start to shiver to create heat. this is an example of a:

a) negative feedback loop b) positive feedback loop
c) unable to determine d) both positive and negative

1. in the respiration lab, what was added to the water to turn it from blue to green?

a) oxygen b) glucose
c) carbon d) carbon dioxide

1. bacteria populations grow in population size by doubling up on all of their dna and then splitting in two. which characteristic of life is this an example of?

a) living things use energy b) living things reproduce
c) living things grow d) living things maintain homeostasis
12.over three years, tims height has increased from 54\ to 511\ and his voice has changed. which characteristic of life does this represent?
a) maintaining homeostasis b) living things contain cells
c) growth & development d) living things use energy/metabolism
13.what is the most basic unit of life?
a) cell b) organ c) molecule d) atom
14.this variable in an experiment is the one that the scientist deliberately changes/tests.
a) independent variable b) dependent variable
c) control group d) controlled variable

1. what process is represented in the model?

a) photosynthesis
b) cellular respiration
c) decomposition
d) hydrolysis
16.there are two types of data. which type of data involves numbers that are obtained by counting or measuring?
a) quantitative b) qualitative
b) descriptive d) none of the above

Explanation:

1. Shivering to maintain body - temperature is a negative feedback loop as it counteracts the drop in temperature.
2. Carbon dioxide turns bromothymol blue (used in respiration lab) from blue to green.
3. Bacteria doubling and splitting is an example of reproduction.
4. Increase in height and voice - change represent growth and development.
5. The cell is the most basic unit of life.
6. The independent variable is the one deliberately changed by the scientist.
7. The model shows cellular respiration as oxygen is used, food is consumed, energy is released, and carbon dioxide and water are produced.
8. Quantitative data involves numbers obtained by counting or measuring.

Answer:

1. a. negative feedback loop
2. d. carbon dioxide
3. b. Living things reproduce
4. c. Growth & development
5. a. cell
6. a. independent variable
7. b. Cellular Respiration
8. a. quantitative