The Living World Questions and Answers

A chemical that results in more his+ bacterial colonies than result from the negative control in the Ames test is a Carcinogen but not a mutagen Mutagen but not a carcinogen Carcinegen and possibly also a mutagen Mutagen and possibly also a carcinogen

Next, you divide a petri dish in half as in the previous experiments. On one half of the dish (Side A), you plate normal bacteria with no mutations. On the other half (Side B) you plate a mutant strain lacking a functional receptor gene, but normal in every other way. Assuming both halves of the dish are allowed to multiply until high cell density is reached, on which side(s) of the dish would you expect to see bioluminescence? Explain.

When cobra venom is introduced into the body it moves along the bloodstream to the diaphragm muscle. It works as a postsynaptic neurotoxin binding to the receptor as an extracellular ligand by interacting with an OH group leaving the acetyl choline channel open which releases ions used in creating an action potential." Just based on the description above, diagram an experiment that would show how the cobra venom / receptor interaction is happening. You need to use a specific patch clamp technique. Along with your drawing, explain which technique you chose and why. Explain how the experiment would work for example where would you put the cobra venom. Explain, what the result, at the cellular level, would be if the muscle cells in the diaphragm were exposed to this venom. Finally explain why cobra venom leads to trouble breathing and eventually death? (Look this up).

The ability to roll your tongue is a dominant trait. Having more than 5 fingers (Polydactyly) is also a dominant trait. Alfred is homozygote for tongue rolling and has five fingers. Alfreda, his wife, cannot roll her tongue and is heterozygous for polydactyly. 1. What is Alfred's genotype? 2. What is Alfred's phenotype? 3. What is Alfreda's genotype? 4. What is Alfreda 's phenotype? What are Alfred's possible sperm with regard to these two traits? What are Alfreda's possible eggs with regard to these two traits? What is the probability that their first child will not roll its tongue and will have the normal number of fingers? You need to make a Punnett square to anwer this question (not to be submitted)

The best way to clean microscope lenses is with: a) lens paper and residual oil remover b) facial tissue and lens cleaner c) cotton-tipped swab and Windex (ammonia) d) a soft cloth and dishwashing liquid detergent

The format of a research paper should include all of the following except which one? A. Five-inch margins. B. Double spaced C. Title D. Name, Date, Instructor, and Course in the upper left corner of first page

Which of the following is the best topic sentence for a persuasive essay? A. Preparing fresh meals instead of pre-packaged meals is a huge time committment & not worth it. B. Fresh-made meals are healthier and cost efficient when compared to pre- packaged meals or fast food. C. Cooking dinner for the family is so old-school, today it's all about convenience.

Not only has Brooke finished recording her latest song called "Pieces," sell the song to her. Choose the transition or transitional phrase that best fits the blank. A. however B. nor C. but also D. yet

Which sequence correctly shows the names for the missing taxa, starting with A and ending with E? A. Kingdom, class, order, phylum, family B. Family, class, order, phylum, kingdom C. Kingdom, phylum, class, order, family D. Family, kingdom, class, order, phylum

The concentration of the appetite regulating hormone ghrelin is about 1.5 x10-10M (ten raise to the power ten molar) in the blood of a fasting person. How many molecules of ghrelin are in 1 L of blood? show calculation.

A reason for the presence or absence of a relationship between beak depth and wing length in this population would be? Large beaks are likely associated with larger birds in general; therefore, beak depth and wing length for the drought-surviving birds are not related. Large beaks are likely associated with larger birds in general; therefore, beak depth and wing length for the drought-surviving birds are related. Small beaks are likely associated with larger birds in general; therefore, beak depth and wing length for the drought-surviving birds are related. Large beaks are likely associated with smaller birds in general; therefore, beak depth and wing length for the drought-surviving birds are not related.

Two directly transmitted viral diseases have the same basic reproduction number (Ro), even though their dynamics are different. Which of the following differences between the two diseases could lead to the same basic reproduction number? One disease has a higher transmission rate and a longer infectious period than the other. One disease has a lower transmission rate and a longer infectious period than the other. One disease has a lower transmission rate and a shorter infectious period than the other. For one disease, the infectious period is long; for the other, no one recovers.

Directions: After reading lesson one in your HMH assignment, Empires in Africa and Asia. Answer the follower questions in complete sentences. Write at least three complete sentences for each question. Examples, (ideas to think about.) 4) Empires declar HMH Ed- Ques 1. How did rivers affect the development of empires? 2. What means did leaders use to spread their empires' influence to new areas? 3. Identify key events in the history and decline of Egypt's New Kingdom. 4. Explain why the Egyptian empire declined. 5. Using what you know about Egypt and Nubia empires which would you have been a part of and why?

Choose a small section of the Narrative of the Life of Frederick Douglass (do not choose the first paragraph since we discussed it together in class). It can be just a paragraph or two or it can be longer, so long as you feel you can explain the passage and can make a personal connection to it. Summarize, in your own words, what was happening and what was important in thi section of the reading (mention the page number at some point). Your summary should be several sentences. Then, make a connection between this section of the reading and your own life, your own experiences, or to other material you have read/learned about in the past. This portion can be just a couple of sentences, but you should explain why/how you connected to this particular passage from the text. To start your journal entry simply click "Create Journal Entry" above, give the journal entry a title, type up your journal entry in response to this assignment as explained above, and click "Post Entry." This is not a formal assignment and it is not part of your grade though you will get some brief feedback, and you may find it useful to look back at this assignment when you write your Midterm Paper.

When something changes and this change initiates a chain of events culminating in a response which counteracts the initial change, then this process is called the effector-receptor response. negative feedback. homeostasis. None of the above are correct.

What was the ironic lesson Trysdale learned? A. He learned that he shouldn't have let his intended delay her answer. B. His pretense to know Spanish to impress intended actually caused him to lose her. C. He learned that he should have impress his intended more so that she would marry

The President and Senate do not select the entire government work force. Most employees are selected through Oright to work affirmative action civil service examinations

In the mid-1700s, many American colonists demonstrated their support for the ideas expressed in the Declaration of Independence, by: demanding their representatives in Parliament vote against increased taxes. protesting against the idea that the colonies had a social contract with great Britain. refusing British demands to relocate to areas west of the Appalachian Mountains. participating in boycotts of British goods to protest increased taxation.

We thought this was not going to end well, but to our surprise, the Good Samaritan ran into the road and grabbed our little puppy, Eli, before the semi truck could hit him What is the allusion in this sentence? What does this allusion mean?

In the inaugural issue of the Journal of Applied Behavior Analysis, Baer, Wolf, and Risley (1968) describe seven dimensions of applied behavior analysis. What are the seven dimensions they describe? applied, behavioral, analytic, technological, generality, conceptually systematic, effective scientific, applied, behavioral, analytic, accurate, significant, standardized standardized, analytic, behavioral, systematic, technically accurate, applied, behavioral significant, applied, behavioral, analytic, generous, social validity, technological

III. Frederick Douglass Question: Describe Madison Washington. How is he a role model?

II Henry David Thoreau Question: Why does Thoreau go to live in the woods? What does it mean to "live deliberately?"

I Ralph Waldo Emerson Question: Why should we be child-like and youthful?

It is more important for animals to produce as many offspring as possible regardless of their size. True False

Most animals have no trade-offs between maturation rates and lifespan. True False

Which of the following is true in sand crickets? Short-wing females invest more resources into egg production than in dispersal Long-wing females invest more resources into dispersal and this limits egg production local food supply variation influences female life history strategy all the above none of the above

how might Efferia Aestuans be affected by humans?

The following is a list of desirable traits in a healthcare worker. Pick three and rate yourself on them and describe how any particular things you learned in this course have affected those traits. Be as specific as possible. Traits and attitudes desirable in a career ready member of a health tearn: Acceptance of criticism Competence Dependability Discretion Empathy Enthusiasm Honesty Initiative Patience Integrity Positive attitude Sense of Responsibility Tact Self-motivation Tact Team player Willingness to learn

"The larger the zone of inhibition, the more effective the antibiotic is." True False

Lara has just had a sudden increase in her workload, which is causing her to feel very stressed. Which action would best help her to reduce the stress? A. finish her work at any cost so people don't think she is inefficient B. prioritize her tasks and complete the important ones first C. refuse to do the work assigned to her and leave the job

The Interpretive Standards say that a zone of inhibition of 20 mm qualifies as a sensitive zone for a newly discovered antibiotic. A zone of inhibition of 17 to 19 mm qualifies as intermediate. If a test bacteria exhibits a 25 mm zone of inhibition when properly tested against this newly discovered antibiotic on Mueller Hinton agar, the rest organism is expected to grow in the presence of the antibiotic die in the presence of the antibiotic unable to predict results from the data given none of these

An increase in ATP levels would tend to complex. A. activate B. inhibit C. phosphorylate ALL OF THESE A and C NONE OF THESE B and C A A and B B C the PDH

Which subunit of the pyruvate dehydrogenase complex is actually responsible for the decarboxylation of pyruvate? E1 E3 E4 E5 E2

The cytoskeleton of a cell is comprised of which of the following macromolecules? Proteins Lipids Carbonhydrates Nucleic acids

Which of the following is the approximate threshold value for mammalian neurons? 0 mV +35 mV -55 mV -80 mV

An example of a disease tranferred by the GI tract route is diphtheria dysentery tuberculosis strep throat

Which of the following typically occurs last during mammalian nervous system development? Completion of myelination in the prefrontal cortex Programmed cell death of DRG sensory neurons Axonal outgrowth from spinal cord motor neurons Opening of the critical period for cortical ODC plasticity

How would you classify the bacteria in this figure (in thioglycolate medium) according to their requirement of oxygen? (bacteria are evenly distributed in the tube) Facultative anaerobe Facultative aerobe Aerotolerant anaerobe obligate aerobe microearophile

Tube__indicates a positive result for the __test A: Indole production B: Voges proskauer B; citrate utilization A; hydrogen sulfide production B; urease

This is a___ result for the___ test negative; hydrogen sulfide production positive; starch hydrolysis negative; starch hydrolysis positive; oxidase positive; urease

If bacteria fermented a carbohydrate, what would you see in the medium? A)deep red color B)no change C)yellow color D)Oblack color E)gas

Which sentence best describes life for women in the Ottoman Empire? They had no legal rights to own property. They were able to travel and leave the home freely. They had legal rights but were restricted in public life. They were not allowed to go out in public.

What is one way Modernist writers use unreliable narrators to support their ideas about the world? A. By writing in code that needs to be deciphered B. By using faulty logic that does not make sense C. By undermining important ideas D. By leaving out important details

Use the lines below to reflect on your action plan. Are you excited? Nervous? Take some time to reflee on the possibility of making your aspirations come to life. Remember to include if monetary or non-monetary benefits helped guide your decision.

There are many different parts of the brain. What is the bottom part of the brain called? A. cerebrum B. brain stem C. cerebellum

How is the height of the stage adjusted in relatively large increments? Condenser knob Coarse adjustment knob Fine adjustment knob Stage clips Control knob

Of the following events, which would be considered the third event? a. APC digests the microbe b. secretion of cytokines by APC c. combination of antigen and MHC d. cell surface expression of antigen and MHC e. combination of T cell with the antigen and MHC

All human viruses must have the ability to 1. have only its nucleic acid enter the host cell 2. kill or not kill the host cell 3. multiply in the absence of living cells 4. extracellular uncoat 5. have their nucleic acid replicate in the host cell choose: A. 1,2 B. 2,5 C. 3,4 D. 4,5 E. 1,4

Use the following passage to answer the next three questions. It has been hypothesized that people who are heterozygous for the allele that causes the deadly genetic condition cystic fibrosis (which, among other symptoms, reduces fertility) are more resistant o the deadly disease tuberculosis. If the cystic fibrosis allele protects against tuberculosis the same way the sickle-cell allele protects against malaria, then which of the following should true of a comparison between regions with and without tuberculosis? Cystic fibrosis deaths should be more common in regions with tuberculosis. Cystic fibrosis deaths should be less common in regions with tuberculosis. Cystic fibrosis deaths should be equally common in both types of regions. Regional differences in the cystic fibrosis death rate should be purely random and unpredictable.

Which of the following could participate in anion binding? Asp and Glu Lys and Arg His Cys and Ser Lys, Arg and His