Practice exam 2 study guide

Question 1

What is Rescue Effect

Answer 1

SINK POPULATION - maintained by indivuales leving source pop

Question 2

What is Mycorrhizae

Answer 2

a symbiotic association between plant roots and fungi

Question 3

What is Science

Answer 3

Assumes all order in the world and leads to accuracy not look true. This is the observed experiment hypothesis and prediction

Question 4

Design a study to test the prediction that low-till farming methods will result in higher species richness of soil microorganisms than conventional (“full’) till farming methods.
- What would you vary or compare (independent variable)?

Question 5

Design a study to test the prediction that low-till farming methods will result in higher species richness of soil microorganisms than conventional (“full’) till farming methods.
- What would you measure/quantify (dependent variable)?

Question 6

Design a study to test the prediction that low-till farming methods will result in higher species richness of soil microorganisms than conventional (“full’) till farming methods.
-In a single, concise sentence, describe the step(s) you would you take (before the statistical analysis) to ensure that your experiment is rigorous and your results are accurate and reliable.

Question 7

In a single, clearly-stated sentence based on course content, justify/explain the hypothesis above.

Question 8

State what type of organism Rhizobium is

Answer 8

bacteria

Question 9

explain why Rhizobium are very important in the context of agriculture and human nutrition

Answer 9

plant - a highly regulated process called modulation, by which the atmospheric nitrogen is converted into an assimilable plant nutrient
human - promotes non-legume growth and quality

Question 10

Explain how pesticide resistance evolves in a population of insects from a population of pesticide- susceptible insects. Mention the two important evolutionary processes in your answer.

Question 11

Which IS an assumption of scientific philosophy?

Answer 11

Different events can have the same predictable cause.

Question 12

Nitrogen (N) tends to make how many covalent bonds with other atoms?

Answer 12

3

Question 13

In the carbonate buffer system, which results from adding more H+?

Answer 13

more H+

Question 14

Based on the course lecture, humans can directly interconvert which molecule with fat?

Answer 14

pyruvate

Question 15

Plants frequently use glucose molecules to make which structural molecule (that is difficult to digest or break apart)

Answer 15

cytosol

Question 16

If there is a year where drought greatly reduces the food and water available to sparrows, which logistic- growth term decreased with reduced food?

Answer 16

K

Question 17

Based on the Nutrition Facts label →,
how many grams of starch are in 1/3 of a medium avocado?

Answer 17

4g total carbohydrate - 3g total sugar - 0 dietary fibers = 1g

Question 18

Which best describes a squirrel eating an acorn (oak-tree seed)?

Answer 18

interspecific predation

Question 19

Which area should have the highest species richness?

Answer 19

Mountainous, tropical continent

Question 20

Which describes the “Greenhouse Effect”

Answer 20

Atmospheric gases trap heat near Earth’s surface.

Question 21

Which is a crop that is high in nitrogen content?

Answer 21

sweet potatoes

Question 22

Based on what has been observed in countries around the world and discussed in class, which of the following had the GREATEST EFFECT on reducing the rate of population growth in countries?

Answer 22

Educating girls and women

Question 23

Which is a staple crop

Answer 23

rice

Question 24

Coral bleaching occurs because…

Answer 24

there is direct competition between zooxanthellae
and algal periphyton.

Question 25

Which of the following is NEVER present in a bacterial (prokaryotic) cell?

Answer 25

endoplasmic reticulum

Question 26

Based on course content, organic farming

Answer 26

usually produces lower yields than conventional farming,
but for a few crops they are equally productive.

Question 27

According to the content covered in this course, what was George Washington Carver’s significant contribution to science?

Answer 27

He focused agriculture on replenishing soil nitrogen