pob post lab questions

Homework that was due on the day of an excused absence is then due within

24 hours of the missed lab

what is the function of starch in plants?

Starch is a polymer of sugars. Plants use it to package sugar made during photosynthesis for storage and later use.

T/F. Generally, if the sample to be viewed with a compound light microscope is a solid substance, then liquid should be added to the slide before placing the solid specimen on it.

True

In a lab setting, when must eye protection (goggles) be worn? Mark all that apply.

When your instructor or supervisor tells you to. When dealing with any liquids in lab While other people at your lab table are still using lab chemicals even if you are finished with them.

The specialized organelles that carry out photosynthesis are called

chloroplasts

Which on the following might have an impact on the organisms you were able to observe in your plots?

time of day season temperature

Photosynthesis is least efficient in green light because chlorophyll reflects green wavelengths.

true

Order from first to last the steps used to set up the sowbug moisture experiment.

1. construct hypotheses 2. add corn starch and sand to environmental chambers 3.add 5 sowbugs to each side of the chambers 4.place inverted lids on top of the chamber 5. record data

The eyepiece of a compound light microscope has a magnification level of 10x. If you were looking at potato cells under the lowest-power objective (4x), what would be the total magnification of the microscope?

40x

Each set of numbers below indicates the average number of sowbugs/pillbugs on each side of the experimental chamber in Lab 2. Check all that indicate that the null hypothesis should be rejected.

9:1

Which of the following represent categorical data? Select all that apply.

Average height of four different tree species. Proportion of a raccoon's diet made up of different types of food. Average mass of Male versus Female cardinals.

When trying to determine the rate of cellular respiration (an aerobic process), why is oxygen measured and not carbon dioxide?

CO2 is produced during both aerobic and anaerobic processes; we couldn't be sure cellular respiration was taking place.

Which of the following would be considered a violation of the University's Academic Integrity Policy?

Giving your lab partner your manual to copy two answers. Using your roommate's completed Lab Manual from a previous semester to complete assignments.

Which of the following statements about glass slide usage are accurate? Select all that apply.

Glass slides should be kept and re-used. Plastic cover slips should be discarded after use. Glass slides should be cleaned between specimens.

Consider the food web of a hypothetical Ozark stream from your lab manual. Which of the following are primary producers found in the diagram? Select all that are correct.

algae Particulate Organic Matter (mostly leaves that fall into stream)

When you want to view a specimen with a compound light microscope using the 40x objective lens you should

always start with the 4x objective to center your specimen and work your way up, focusing each objective and moving on.

Which of the following should be included with a graph/figure? Check all that apply.

axis labels units indicated for each axis regularly marked axis intervals a figure caption describing what is depicted

What is the independent variable for an experiment comparing different tadpole diets to growth rates?

diet

T/F. Because the cell is consistently using up oxygen, the concentration of oxygen inside the cell is always higher than the concentration outside.

false

T/F. Doubling the plot size would be likely to double the calculated diversity.

false

What is photosynthesis? (Check all that apply).

fermentation the conversion of sunlight energy into chemical energy the process by which plants, some bacteria, and some protist use the energy from sunlight to produce sugar respiration phosphorylation

What should be used to clean the optical surfaces (lenses) of a microscope?

lens paper

Accumulating ________ unexcused absences will result in a failing grade.

more than 2

Slides should always be prepared _____.

on a paper towel that is on a flat surface; but not on your lab manual because then you can't read it.

Chloroplasts allow Elodea cells to perform what activity that the potato and onion cells we observed cannot?

photosynthesis

All living lab specimens should be treated as

potentially harmful

what is the function of the bacteriums capsule?

protection

A measure of diversity may include an element addressing evenness in the numbers of species in an area. Simpson's Diversity Index incorporates ___________ as an element of evenness.

relative abundance

In which section of a lab report do you include visual representations of the data?

results

which of the following structures are found in prokaryotic cells?

ribosomes

When a human eats a steak (a cut of meat from a cow, an herbivore), the human is acting as a _____.

secondary consumer

Species richness and relative abundance describe the _____ of a community

species diversity

To be of value to science, hypotheses must be _____.

testable/falsifiable

t has been shown that female Pacific tree frogs (Hyla regilla) are more likely to choose to mate with a male with a louder call than other quieter local males. A proximate explanation for this might be that _____.

the louder calls stimulate the female to orient to the loud male, ignoring quieter males.

During the experiment measuring energy production in plants, the highest rate of cellular respiration occurred in

the tube containing germinating seeds.

A student set up an experiment to show the effect of light color on photosynthesis in Elodea plants. She filled two test tubes with distilled water and placed a piece of Elodea in each of the tubes. She added a drop of phenol red, which turns red in a basic solution and yellow in an acidic solution. She blew in each tube before placing the volumeters on the top of the tube. Why did she blow into the tube?

to add carbon dioxide to the tube

Onion and potato are both underground structures for plants. What is their function?

to store energy for later use

Which of the following items will you need to make a wet mount?

transfer pipette clean slide tweezers cover slip

If sowbugs/pillbugs moved back and forth between the experimental chamber compartments but averaged 5 on either side consistently throughout the observational period, you would retain the null hypothesis.

true

T/F. For a hypothetical food web for a diversity plot located in a forested area in Fayetteville, Arkansas, it would be reasonable to include a coyote.

true

T/F. If you know about an upcoming absence, then you must notify your instructor and make arrangements with them at least a week before you expect to miss class in order for your absence to be considered excused.

true

T/F. In my forest habitat there were mostly plants. In addition, I saw 2 ants, 1 spider, a butterfly, and a mushroom. This makes sense because plants are producers, and I would expect there to be fewer individuals of each higher trophic level.

true

T/F. observations were repeated in the same habitats and plots in January, the diversity results would likely be different.

true

Most atmospheric oxygen comes from photosynthesis. From which of the following molecules is the oxygen derived?

water

Which of the following cell slides from Lab 3 were safe to wash and reuse after viewing?

yeast, elodea, onion