Bio 1010 Lab

Question 1

steps of scientific method?

Answer 1

identify problem, form hypothesis, collect data, analyze data, form conclusion

Question 2

sections of a lab report?

Answer 2

title, introduction, materials and methods, results, discussion, references

Question 3

zooplankton

Answer 3

non-photosynthetic, produce CO2, consume O2

Question 4

phytoplankton

Answer 4

photosynthetic, produce O2, consume CO2

Question 5

species richness

Answer 5

number of species in a community

Question 6

species evenness

Answer 6

relative abundance with which each species is represented in a community

Question 7

shannon-weiner diversity index

Answer 7

determines how diverse a community is

Question 8

what score does the shannon-weiner diversity index have to be greater than to be diverse?

Answer 8

1.7

Question 9

what is pH?

Answer 9

presence or absence of hydrogen ions in water

Question 10

what is dissolved oxygen?

Answer 10

measures amount of O2 in water

Question 11

why are macro invertebrates useful when determining water quality?

Answer 11

sensitive to change in ecosystem, easy & inexpensive to collect, relatively immobile, critical part of food web

Question 12

how are macro invertebrates useful when determining water quality?

Answer 12

can be found in all but the most severely polluted/ disturbed habitats

Question 13

what is coliform bacteria analysis?

Answer 13

measurement of fecal contaimination

Question 14

scientific notation?

Answer 14

: any number 1-10

x 10^?

?: indication of how many decimal places to move

Question 15

doubling time formula?

Answer 15

70/ r

Question 16

what does the r stand for in doubling time formula

Answer 16

rate of increase in percentage

Question 17

compound growth equation?

Answer 17

Nt= N0 x (e)^rt

Question 18

what does r stand for in the compound growth equation?

Answer 18

population growth rate in decimal form

Question 19

independent variable

Answer 19

The factor that is manipulated; variable whose effect is being studied

Question 20

dependent variable

Answer 20

The measurable effect, outcome, or response in which the research is interested

Question 21

controlled variable

Answer 21

a factor in an experiment that remains constant

Question 22

control group

Answer 22

the group that does not receive the experimental treatment

Question 23

Parts of a compound microscope?

Answer 23

ocular / eyepiece, objective, stage, course adjuster, fine adjuster

Question 24

What are dissecting microscopes used for?

Answer 24

larger objects

Question 25

what differentiates the dissecting microscope from the compound microscope?

Answer 25

does not contain the objective lenses, stage doesn’t move, 2 light sources

Question 26

what magnification does a low objective lens have?

Answer 26

4x

Question 27

what magnification does a medium objective lens have?

Answer 27

10x

Question 28

what magnification does a high objective lens have?

Answer 28

40x

Question 29

what magnification does the ocular lens have?

Answer 29

10x

Question 30

what is the total magnifying power?

Answer 30

objective Lens Power x ocular Lens Power

Question 31

what does the field of view of a microscope do as magnification increases?

Answer 31

decreases

Question 32

population

Answer 32

group of individuals of the same species living in a particular geographic region

Question 33

absolute density

Answer 33

the exact number of individual organisms living in an area

Question 34

relative density

Answer 34

an index that can be used for density comparison

Question 35

eutrophication

Answer 35

excessive growth of algae and aquatic plants due to added nutrients typically nitrogen and phosphorous

Question 36

species diversity

Answer 36

number and abundance of species in a community

Question 37

why is the mark and recapture method used?

Answer 37

to estimate population size where it is impractical to count each one

Question 38

how to create an in-text citation?

Answer 38

(authors last name, et al., year published).

Question 39

what does a spectrophotometer do?

Answer 39

measures how much light is absorbed, reflected, or transmitted through a sample

Question 40

what # is a growing population categorized by in fertility rates?

Answer 40

above 2.0

Question 41

what # is a declining population categorized by in fertility rates?

Answer 41

below 2.0

Question 42

what # is replacement level categorized by in fertility rates?

Answer 42

exactly 2.0

Question 43

reasons for high fertility rate?

Answer 43

high infant mortality, low economic opportunity, cultural large families, lack of birth control, religion, access to maternal and family care, starting families young

Question 44

how to bring down fertility rates?

Answer 44

birth control, education of women, the fewer children you have, the better quality of life those children have, starting families later, urbanization