The Living World Questions and Answers

A scientist has designed a weight-loss pill and wants to test it on people. She believes that the pill will cause people to lose 2 pounds while they are sleeping. In order to test this pill, she gives 10 people the pill before they go to sleep for 8 hours, and then weighs them in the morning. She gives another 10 people a different weight-loss pill before they go to sleep for 8 hours, and then weighs them in the morning. This experiment is missing the _____ group.

A cell in a hypertonic solution: loses water gains water gains and loses the same amount of water none of the above

A covalent bond is: an example of a bond that results in ionic compounds the transfer of electrons from one atom to another a sharing of electrons between two atoms an attraction of charged atoms

1. Michael Bell and collegues (2004) reported that the three-spined sticklebacks that colonized the freshwater Loberg Lake from an adjacent marine environment A. evolved reduced lateral plates but retained pelvic structures B. evolved more pronounced lateral plates and pelvic structures. C. evolved reduced lateral plates and loss of the pelvic structure of marine sticklebacks, so that the freshwater morphology accounted for >75% of the population in 6 years. D. could not survive in the freshwater environment and went extinct within 6 years.

What are These Little Green Things? A science teacher at your school makes the following gif, taken from a living thing in a fish tank in the teachers' lounge. She tells you that they're taken at a magnification of1250x. Use this information and the phenomena you observe in the gif to answer the following questions. Let's say you had access to the slide that this image was taken from, a microscope, and the fish tank. What pattern of evidence could be observed in your classroom lab to support the idea that this is a part of a multicellular organism?

When eating yeast, the paramecium will produce digestive enzymes that help break down the yeast into smaller molecules. Choose three cellular structures inside the paramecium and explain how they play a role in this process.

Nitrogen is not readily available to plants and animals because it is largely in an unusable form in Select one: A. water. B. soil. C. air D. tissues of living organisms.

What is luminol used for? Makes blood foam Makes blood change Type Makes bloody surfaces clean Makes blood glow in dim light

Which of the following are found in both prokaryotic and eukaryotic cells? a. Cell membrane b. Cytoplasm c. Ribosomes d. Genetic material (DNA) e. All of the above are found in both types of cells

How can mate pairs "rescue" reads corresponding to non-unique genome regions? Group of answer choices. A. Two ends of a mate pair act together to increase read length and allow rescue. B. An otherwise ambiguous read maps uniquely when constrained by its mate C. If two reads partially overlap, the ambiguous one can be rescued. D. None of the above

Why would a physician give L-DOPA to a patient with Parkinson's disease? it is converted to dopamine and can increase the dopamine production in surviving dopaminergic neurons it cannot cross the blood-brain barrier and so it helps with the tremor and other motor symptoms it is converted to serotonin and helps to make the substantia nigra look more dark again it is converted to dopamine and can cause the dopaminergic neurons to regenerate

How should you prepare for a possible tsunami? Select the three correct answers. A. Bring lawn furniture indoors. B. Learn your elevation above sea level. C. Create and practice an evacuation plan. D. Learn the local tsunami warnings.

What ritual is used to please the ancestral spirits? sacrifices all night dancing artwork tanned animal skins

Which of the following statements is most consistent with the geologic record? Sponges and cnidarians first evolved during the Cambrian Fossils of sponges and cnidarians (e.g. jellyfish) first appeared during the Cambrian, but these groups had ancestors that evolved before the Cambrian Fossils of brachiopods and arthropods (e.g. crabs, insects) first appeared during the Cambrian, but these groups had ancestors that evolved before the Cambrian Vertebrates evolved from echinoderms

The Gaia Hypothesis proposes A) that the systems of the earth arei ndependent and function on a mutually exclusive basis. B) that the Earth is only one part of a greater whole in the solar system. C) that our planet functions as a single organism that maintains the conditions necessary for its survival.

Concerning the names on scientific publications, pick the correct statement. An asterisk (*) is always associated with the person who wrote the article. The senior (head of project) author is always listed first. There can be any number of names on publications and in any order. The names vary as per the discipline but are almost always in alphabetical order. None of these statements is correct. The author who supported the research is usually listed first but there is a limit to the number of authors.

Jonathan Edwards' "Sinners in the Hands of an Angry God" is often known as the most famous sermon delivered on American soil throughout all of history. It's famous-or shall we say, infamous for its fiery, intimidating tone and effective use of imagery. Before we analyze the text, we will listen to an audio reenactment of the original sermon and focus on imagery. 1. LISTEN CAREFULLY. (Click here for audio) 2. Copy/paste images that come to mind. 3. Record your feelings and thoughts.

2. Which process results in carbon moving directly from the atmosphere into the biosphere? * the weathering of rocks by a river the decomposition of plants on the forest floor the eruption of a volcano the photosynthesis of a plant

After a drought in 1977, researchers hypothesized that on the Galápagos Island Daphne Major, medium ground finches with large, deep beaks survived better than those with smaller beaks because they could more easily crack and eat the tough Tribulus cistoides fruits. A tourist company sets up reliable feeding stations with a variety of bird seeds (different types and sizes) so that tourists can get a better look at the finches. Which of the following events is now most likely to occur to finch beaks on this island? evolution of yet larger, deeper beaks over time, until all birds have relatively large, deep beaks increased variation in beak size and shape over time evolution of smaller, pointier beaks over time, until all birds have relatively small, pointy beaks no change in beak size and shape over time

In a hypothetical environment, fishes called pike-cichlids locate their prey by sight and eat small, immature algae-eating fish. Thus, the population of algae-eaters experiences predatory pressure from pike-cichlids. Which of the following possible changes is LEAST likely to occur in the algae-eater population in future generations? improved camouflage of the algae-eaters production of fewer offspring by algae-eaters decreased day-time activity by algae-eaters increased size of female algae-eaters that then produce more and larger young

Read the passage and choose the best answer to the question following the passage: "Some guys were frantic to join the fight while others were looking for a way to avoid going out. Spueglia was somewhere in the middle. After what he had seen of the lost convoy, part of him felt like going out into that city was like committing suicide. It was crazy, but they had to do it. They were going to load Rangers on the back of flatbed trucks lined with sandbags that weren't going to stop a damn thing, and roll them out into the streets where every one of these skinny Somalia motherf@*%#+s was trying to kill them, and for what?" - Black Hawk Down by Mark Bowden What is Spueglia feeling about the mission? Fighting is the city is necessary. Fighting in the city is fruitless. Refusing to fight is smart. Fighting in the war is like Somalia.

If biological species are defined in terms of reproductive compatibility, which of the following factors determines the formation of a new species? Select all that apply. a lack of gene flow gene pool expansion reproductive isolation hybrid formation

What is the appropriate protective clothing that must be worn in the laboratory? A. Long pants that cover the knees and short-sleeved shirts with no bare midriff or back. B. A lab coat C. Either A or B

Researchers randomly divide participants into groups. Each group takes a different amount of omega-3 fatty acid supplements daily for a month. One group receives a placebo. The researchers measure the impact on cholesterol levels in the blood. What is the purpose of random assignment in this experiment? To ensure that all people with high cholesterol have an equal chance of being selected for the study To produce treatment groups with similar characteristics To increase the accuracy of the research results and prevent skewness in the data

Which of the following most assisted the Spaniards' conquest of the Aztecs in the sixteenth century? Spain's superior military technology alone wiped out thousands of the native population. Assistance by the Inca Empire. The internal fighting among the formerly subject Indian nations over succession to the empire's throne. Montezuma assumed the Spaniards were gods and led no resistance.

According to the National Coffee Association, the optimal temperature to brew coffee is 205 degrees fahrenheit. At your local coffee stop the ambient temperature is a comfortable 68 degrees. A cup of coffee is brewed and poured at the N.C.A. optimal standard temperature previously stated. The cup is placed on the counter and forgotten. After 3 minutes, the coffee is 185 degrees. After 6 minutes, the coffee is 167 degrees. Write a function that models the exponential decay of the coffee's temperature with respect to the number of minutes that it sits and cools.

Select the correct answer from each drop-down menu. Complete the sentences to explain how photosynthetic organisms changed our lives on Earth. The _____ in the atmosphere that all living beings depend on was generated by cyanobacteria during the Archaean and Proterozoic eras. The presence of this substance is what makes _____ possible on Earth.

A rabbit's cells include many carbon-based molecules, such as DNA and proteins. Which statement best explains how a rabbit obtains the carbon that it incorporates into its cells? Choose 1 answer: The rabbit breathes air, which contains carbon in the form of carbon dioxide. The rabbit lives in a burrow in the soil, which contains various sources of carbon. The rabbit eats grass, which contains carbon within its sugar molecules.

Which atmospheric conditions occur when the dry-bulb temperature is 30°C and the difference between the dry-bulb temperature and wet-bulb temperature is 1°C? warm and humid warm and dry cool and humid cool and dry

What are some ways for researchers to obtain an SDS at the Broad? a.) Look on the internet b.) Ask someone in another lab c.) Look at the Emergency Action Plan d.) Contact the chemical manufacturer e.) Ask someone in EHS f.) Call 911

Which statement about hydrogen bonds is FALSE? Individual hydrogen bonds in liquid water are static and are only broken or remade upon boiling water. Almost all Hydrogen bonds of liquid water must be broken for water to vaporize. The strength of a hydrogen bond depends on the three bonding atoms lying in a straight line. Each oxygen atom in liquid water can hydrogen bond with multiple water molecules. Covalent bond formation will have a more negative change in enthalpy compared to H-bonds.

Which of the following is FALSE regarding generics? Generics have the same active ingredients as the brand name Generic names may be the chemical name or a term that refers to the chemical makeup of the drug Generics are the trade names of each drug Generics offer savings to patients over the brand name product

Which of the following statements stated below is precisely correct/true? A. Some experiment studies may contain multiple variables due to how the experiments are designed. B. Quantitative variables can be discrete or continuous, and they can be measured. C. Variables are properties or characteristics of some event, such as object or person that can take on different values or amounts. D. Independent and dependent variables are usually two distinct types of variables in the sense that the experimenter can manipulate the independent variables; and dependent variables are the measurable outcomes that cannot be manipulated. E. All of the answers (A, B, C, and D) are the right answer choices for this question.

Because the Constitution sets out the enumerated powers of each branch of government, there is virtually no conflict over the powers of the branches. True False

A hypothetical organism has 10 chromosomes for each of its body cells (somatic cells). Answer the questions below based on this organism a. Skin cells are continuously being rubbed off and replaced. How many chromosomes will be contained in each new skin cell of his that is replaced? b. This replacement occurs through the process of c. The diploid number (2n) for this organism is d. This organism would have how many homologous pairs of chromosomes?

Tamper-resistant prescription pads are not required by Medicaid when: A printed e-prescription is taken by the patient to the pharmacy Prescriptions are directly faxed from the prescriber to the pharmacy Medicaid is a tertiary payor of the prescription that is being filled Medicaid is a primary payor of the prescription that is being filled

At the beginning of the rising phase of the action potential, what is the relative voltage driving force for Na+ and K- a. sodium higher voltage driving force than potassium b. there is O voltage driving force for both c. there is equal voltage driving force d. potassium higher voltage driving force than sodium

At what step in gene expression does immunocytochemistry measure the level of a specific gene? a. mRNA splicing b. transcription C. nuclear export d. translation

Amoxicillin is used to treat pneumonia with a dose of 1,601mg being given to a patient every day. How many moles (Mr of amoxicillin is 365.4) is given to the patient every day? Give your answer in mM and to two decimal places.

What was the purpose of the Fair Employment Practice Committee (FEPC)? To establish employment for interned individuals of Japanese, Italian, and German descent during World War II To abolish racial discrimination in the United States armed forces and ensure equal treatment and opportunities for all members To establish a federal agency tasked with finding sustainable employment for millions of out-of-work Americans in major public works projects To help African Americans find employment during World War II by prohibiting federally-funded companies from discriminating on the basis of race

Use the information below to answer the following question. You are hereby requested to take the following steps to comply with the recent blackout order. (1)... have extinguished all street lights on waterfront streets and highways at once (2) Screen water front side lights on all streets running down to the waterfront (3) Screen all advertising lights and lighted windows near beach front. (4) Screen all bright lights on seawards side, directly visible from the sea, and within two miles from the waterfront (5) In case of brightly lighted installation near beach have the light so directed and screened so that no direct light can be seen from offshore. -Palm Beach Civilian Defense Council, O.B. Carr, Executive Director Why did the state of Florida issue this order? To limit community social activities during the war. To conserve scarce energy resources during the war. To conceal coastal military operations from German spies. To protect civilian coastal settlements from German submarine attacks.

How might the fecal-oral route of disease transmission be disrupted? Washing fomites with soapy water Coughing or sneezing into your inner arm Getting syphilis treated during the first trimester of pregnancy Handwashing before eating a meal Wearing a mask that can block aerosoles

The United States attempted to avoid involvement in World War II by doing which of the following? Passing a series of neutrality laws Officially recognizing the existence of the Soviet Union Establishing the Good Neighbor Policy with European nations O Forgiving the German reparations incurred during World War I

One acre of land is equivalent to 43,560 square feet. Write a program that asks the user to enter the total square feet in a tract of land and calculates the number of acres in the tract. Sample run: (user's input is highlighted in red)

The intestinal immune system differs from the rest of the immune system in that the intestinal system is "prepared in advance" to deal with common invaders by having & antibodies on site. lymphocytes; IgD IgM; IgE lymphocytes; IgA IgG; IgM

White blood cells called B cells produce proteins that can be used for the treatment of certain illnesses. However, these B cells do not live for very long on their own. To keep the B cells growing for a long time in laboratories, scientists fuse the B cells with cancer cells (fused B-cancer cells) that do grow for a very long time. The particular cancer cells used for the fusion are treated with chemicals that make them unable to produce the nitrogenous bases adenine and guanine, but the B cells with which they are fused to produce these nitrogenous bases. The scientists grow the large fused B-cancer cells in a growth medium that contains necessary nutrients for the cells and includes a source of carbon. a. Describe the role of carbon in biological systems. b. The membranes of both B cells and the cancer cells are largely composed of phospholipids. Explain how, when the membranes are fused, the polar parts of phospholipids from one cell will interact with the phospholipids from the other cell and how the nonpolar parts of the phospholipids from one cell will interact with the phospholipids from the other cell. c. Make a claim about the most immediate effect on the fused B-cancer cells if the fused cells are transferred to a growth medium that lacks a source of nitrogen. d. Provide reasoning with evidence based on the composition of biological macromolecules to support your claim.

There are many unicellular organisms. In addition, anything less than a cell is not alive. What do these two statements imply about cells? A. Bacteria are single-cell organisms. B. Most organisms are made up of cells. C. Cells are the basic units of life. D. Cells come from preexisting cells.

Neanderthals a. evolved in Africa about 400 000 years ago b. never hybridize with modern human c. is a direct ancestor of modern human d. never co-existed with modern human as it became extinct before there were modern human e. evolved in Eurasia about 400 000 years ago.

Which statement best describes the beliefs of Confucius? A. Dynasties or rulers who displeased the gods were destined to fail. B. Rulers have a responsibility to be good and just to their subjects. C. Government is unnatural and problematic. D. Deceased ancestors watch over us and influence our daily life and require offerings.

In Buddhism, if someone reaches "enlightenment," what is that called? A. Nirvana B. Buddhism C. Heaven D. Wisdom