Exercise 7: Experimental Variables Determine the variables tested in the each of the following experiments. If applicable, determine and identify any positive or negative controls. Observations 1. A study is being done to test the effects of habitat space on the size of fish populations. Different sized aquariums are set up with six goldfish in each one. Over a period of six months, the fish are fed the same type and amount of food. The aquariums are equally maintained and cleaned throughout the experiment. The temperature of the water is kept constant. At the end of the experiment the number of surviving fish is surveyed. A. Independent Variable: B. Dependent Variable: C. Controlled Variables/Constants: D. Experimental Controls/Control Groups: 2. To determine if the type of agar affects bacterial growth, a scientist cultures E. coli on four different types of agar. Five petri dishes are set up to collect results: ? One with nutrient agar and E. coli ? One with mannitol-salt agar and E. coli ? One with MacConkey agar and E. coli ? One with LB agar and E. coli ? One with nutrient agar but NO E. coli All of the petri dishes received the same volume of agar, and were the same shape and size. During the experiment, the temperature at which the petri dishes were stored, and at the air quality remained the same. After one week the amount of bacterial growth was measured. A. Independent Variable: B. Dependent Variable: C. Controlled Variables/Constants: D. Experimental Controls/Control Groups:

NOTE : ESSAY QUESTION - PLEASE ANSWER IN DETAIL (1-2 paragraphs)

Question : Discuss the characteristics, inheritance, and development of cancer; specifically talk about the role of genes, gene regulation, and the environment in the development of cancer. In addition, make sure to talk about why it is so difficult to treat/cure cancer.

In words, trace blood flow through the systemic and pulmonary circuits.

describe how healthy diet works to prevent cardiovascular disease, diabetes, obesity, and other health problems.

1. In what part of a hepatocyte would a drug interaction involving CYP enzymes most likely occur?

A. Endoplasmic reticulum

B. Lysosomes

C. Golgi apparatus

D.Outer cell membrane

E. Nucleus membrane

2. Simvastatin is at higher risk of initiating rhabdomyolysis when co-administered with all except the following?

A. Anti-IL-6 therapy (tocilizumab)

B. Strong CYP3A4 inhibitors

C. Grapefruit juice

D. Mechanism-based CYP3A4 inhibitors

E. Hepatocyte OATP inhibitors

A year-old jackal that attempts to find a mate and raise its own offspring will produce an average of 0.4 offspring in the first season. Another option would be to help its older sibling (full sibling) rear offspring. What is the minimum number of offspring the sibling would have to produce in order for the inclusive fitness of a year-old jackal to be higher in the helper role than raising its own offspring?

How does a mother’s LEK impact Tsimane child health

Why must the circulatory and respiratory systems work together?

Explain the differences between the evolutionary theories of Charles Darwin's natural selection and Lynn Margulis Endosymbiosis. Are the theories testable and expensive, according to Steven Gould's standards? Does the apparent contradiction between the theories weaken or strengthen the theory of evolution? Why or why not? Feel free to address Michael Pollan's discussion about planets and Lovelock's Gaia theory to round out your ideas.

Provide a brief overview of the mechanisms employed to accomplish the relatively constant blood glucose level in humans of ~5mM and comment on why it is necessary.

Internal thermal regulation is an example of this property of life:

Select one or more:

a. evolution

b. homeostasis

c. reproduction

d. order

Crop improvement can be done by conventional plant breeding or by genetic engineering. Can you describe the two methods?

What does the dye intensity tell you? What information do you get about the fold change? Why is it important to look at both types of data when considering if a gene might be important for the process you want to study?

Name the parts of an operon and why are they for prokaryotes and not eukaryotes .

    -Where is it okay to have transpooons and where it may be dangerous

-what are all the Rnas and Dnas and their function