As a researcher, you are planning a study to look at the effects of different levels of a particular chemical on the mortality rate of a type of fish. You want to reduce as many extraneous variables as is possible. Extraneous variables can unintentionally influence the results of your experiment. What might be some examples of extraneous variables you might want to control to reduce the effects of that variable on the results of the experiment? Select all that apply. Select 2 correct answer(s) The amount of light each tank receives The age of the fish The fish mortality rate

If your blood thickens the heart doesn't have to work as hard pumping the blood through your body. True False

Multiple Cholce Question Which of the following about classifying viruses is FALSE? An online database classifying viruses is kept by the ICTV (International Committee on Taxonomy of Viruses) Viruses can be classified based on different viral characteristics. It provides a useful way to identify and study viruses. It is not as important as classifying organisms since they are not living entities.

Question 1 Match the description with the pathogen: \begin{array}{|l|l|} \hline Candida\ albicans\ &\ [Choose]\ \\ \hline Trichomonas\ &\ [Choose]\ \\ \hline Histoplasmosis\ capsulatum\ &\ [Choose]\ \\ \hline Aspergillus\ &\ [Choose]\ \\ \hline \end{array}

Strata granulosum is abundant with which cell? Dendrocytes Keratinocytes Melanocytes

Which of the following is dominated by adipose tissue? Epidermis Hypodermis Dermis

Which of the following are described as partially encapsulated lymph tissue located in the throat? palatine tonsils pharyngeal tonsils lingual tonsils Peyer's Patches

Which of the following is not a function of proteins in the body? Serving as cofactors for enzymes Maintaining blood viscosity and osmolarity Muscle contraction Catalyzing enzymatic reactions Transport of blood lipids

Which sweat glands are only found in restricted areas? Sebaceous gland Merocrine gland Apocrine gland

Great. The flame kills all the microbes and sterilizes the wire loop.Why is this important to do before working with the chicken farm sample? a) To avoid contamination b) Salmonella can be found everywhere c) To reduce the spread of antibiotic resistance d) All the answers are correct

26. How is the DNA of a mouse different from the DNA of a snake? A. Only the DNA of the mouse contains nitrogen bases. B. The DNA molecules have different base sequences. C. The DNA of a mouse does not contain adenine. D. Only the DNA of a snake contains thymine.