Lab Safety
Is it recommended to wear contact lenses and safety goggles at the same time?
No, it is recommended to avoid contact lenses
Increasing the amount of cholesterol in a plasma membrane would lead to an increase in…
A. membrane permeability
B. atherosclerotic plaques
C. membrane fluidity at low temperatures but a decrease in membrane fluidity at high temperatures
D. membrane fluidity at high and low temperatures
C
A lab technician grows a liquid bacterial culture overnight, in media without any antibiotics. The next morning, the culture is cloudy. She takes a small amount of this culture and puts it into new media containing tetracycline. The next day, she checks the culture and the media is not cloudy. What happened?
A. The bacterial culture grew the first night but not the second night
B. The bacteria were resistant to the antibiotic tetracycline
C. The bacteria were in the lag phase after the first night of growth
D. The bacteria were in the stationary phase after the second night of growth
A
A competitive inhibitor of eukaryotic RNA polymerase III would have the greatest effect on:
A. replication
B. reverse transcription
C. translation
D. mutation
C
Define a cladogram.
a branching diagram that shows the relationship between species
What is the major similarity between cooled and heated glassware?
They look the same to us
Name the (2) ways in which you can observe.
Using your (5) senses and then form a question. During the experiment observe and record qualitative and quantitative information
Define homologous structure and analogous structure. Give an example for each.
Homologous: Structures that are similar in different species due to a common ancestor but look different on the outside, bat wing whale flipper human arm.
Analogous: Structures that evolved independently in different species due to similar environmental stressors or mutations, cat leg and prayer mantis leg.
100kg is how many grams? What phrase do we use the remember our metric units?
100,000. King Henry Came Over For Chocolate Milk
What animal is most closely related to humans?
Chimpanzees
Lab partner should inform teacher, wash eyes or skin immediately
Define independent variable and dependent variable. What axis on a graph do each go to?
Independent: What "I" change, only 1 on x-axis. Dependent: what is affected by independent variable, on y-axis.
Define vestigial structure and provide (2) examples.
Structure that is now nonfunctional or reduced in function, answers will vary
What is pointillism? How did we use it in class?
Using dots of different sizes and colors to make an image, answers will vary.
If there are (4) branches on a cladogram. Branch (1) is closest to common ancestor and branch (4) is furthest. Which branch would be most closely related to branch (4)?
Branch (3)
When diluting an acid always pour the ______ into the ________.
acid, water
What are (3) control variables in the Benedict's Test? What are (2) control groups?
Answers will vary. Positive control group = sugar water, negative control group = water.
Define embryology and provide (1) example.
The study of embryos and their environment
How we can view certain homologous structures and determine a common ancestor!
Example: all vertebrates including humans and chickens look the same/similar at first.
When using a micropipette, what stop do you go to to take up a sample? What stop to release?
1st, 2nd
In modern science, do evolutionary biologists solely develop cladograms based on morphology?
No, use DNA, homologous vs. analogous, etc.
Explain the proper way to use a bunsen burner.
Always wear safety goggles when using a Bunsen burner. Never heat a chemical that you aren’t instructed to. Point open test tubes away from yourself and others when heating. If a flame comes toward you, turn off gas immediately. Never heat a closed container, it may cause an explosion. Use tongs or heat-resistant gloves to hold hot objects. To light: turn on gas then immediately use match/lighter to turn on flame. Adjust the flame so there is a clear blue flame surrounding an inner blue cone.
Draw gel electrophoresis: Include wells, gel, power source, positive and negative electrode, longer bands, shorter bands, and what way DNA would move.
Student drawn answer can be checked by viewing amoeba sisters gel electrophoresis video.
Define model organisms. Provide an example of a model organism.
Model Organisms are species that have similar DNA to us and we use them to better understand disease. Answers will vary.
When using a micropipette, describe the proper technique used when holding the pipette including: when gathering a sample, and when loading on gel electrophoresis.
1: Hold with thumb on top button, hold sample in one hand and pipette in the other.
2: Both elbows on table, both hands on micropipette.
Draw a cladogram and include the animals: worm, spider, ant, cricket, fly, dragonfly, and butterfly. Include the traits: wings, double set of wings, curly antennae, 6 legs, legs, abdominal appendages, segmented body, crushing mouthparts.
Student drawn, can be compared to cladogram activity given in class.