Question

unit 1 - quiz 1 vs name: sophie l

1. which of the following is a response to the environment?

a) pupils constrict when exposed to bright light
b) blood glucose levels drop significantly after eating food
c) a flashlight shone into the eye
d) a rubber band snapping on your hand

1. name the organelle where most atp is generated in the cell.

a) nucleus b) mitochondria c) ribosomes d) chloroplast

1. if body temperature is too high, some blood vessels increase in size (dilate) and sweat glands will secrete sweat, resulting in a lower body temperature. these changes are an example of

a) feedback mechanisms b) genetic mutations
c) a learned behavior d) an inherited disorder

1. in the bromothymol blue cellular respiration lab that we carried out, what trend would you expect to see in the amount of time it takes for the solution to change color as the amount of exercise increases?

a) time for color change should increase
b) time for color change should decrease
c) time for color change is not affected
d) time for color change should increase and then decrease

1. most biologists dont consider viruses living. why?

a) they are small b) they dont have genetic material
c) they dont use energy d) they dont evolve

1. the process of maintaining constant internal conditions to stay healthy.

a) homeostasis b) stimuli c) tropism d) response

1. the part of the experiment that remains the same for all groups.

a) independent variables b) dependent variables
c) controlled variables d) control group

1. green plants produce their own food through the process of photosynthesis. which characteristic of life does this represent?

a) all living things maintain homeostasis b) all living things grow
c) all living things use energy d) all living things

Explanation:

1. Pupils constricting in bright light is a physiological response to the environment.
2. Mitochondria are the power - houses of the cell and generate most ATP.
3. Blood vessel dilation and sweating to lower body temperature are feedback mechanisms for homeostasis.
4. As exercise increases, cellular respiration increases, more carbon - dioxide is produced, and the time for bromothymol blue color change decreases.
5. Viruses don't use energy on their own and are not considered living by most biologists.
6. Homeostasis is the process of maintaining constant internal conditions.
7. Controlled variables remain the same for all groups in an experiment.
8. Photosynthesis in green plants shows that living things use energy to produce food.

Answer:

1. a) pupils constrict when exposed to bright light
2. b) Mitochondria
3. a) feedback mechanisms
4. b) Time for color change should decrease
5. c) They don't use energy
6. a) Homeostasis
7. c) controlled variables
8. c) All living things use energy