Exploring Life Ch1 Biology Test

a proposed explanation for a set of observations.

A hypothesis is

two versions of the experiment are conducted, one differing from the other by only a single variable

A scientist performs a controlled experiment. This means that

be more resistant to that antibiotic.

An antibiotic kills 99.9% of a bacterial population. You would expect the next generation of bacteria to

theory

An explanation of an idea that is broad in scope and supported by a large body of evidence.

invention of the microscope and creation of evolutionary trees

Basic science discoveries often lead to the development of technology, and the development of technology often leads to new scientific discoveries. Which of the following is not an accurate pairing of a technology and a discovery?- invention of the microscope and creation of evolutionary trees measurement of atmospheric CO2 and understanding of climate change sequencing of genomes and understanding evolutionary relationships among organisms genetic engineering and creation of new drugs

Plants don't eat sunlight; they use sunlight to make sugars.

During a discussion about ecosystems, a student says, "Plants eat sunlight, and animals eat other organisms." Which response to the student's comment is most accurate?- Plants don't eat sunlight; they use sunlight to make sugars. Plants eat sunlight, but animals also eat bacteria, which are not considered organisms. Plants don't eat sunlight; they eat sugars that they get from the soil. Plants eat sunlight, but they also eat other organism such as decomposers.

organelle, cell, and tissue

If you eat a hamburger, you are mainly eating ground-up beef muscle. What levels of organization are represented in this ground-up muscle?

typically flows from producers to a series of consumers.

In an ecosystem, energy

molecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem

Life is organized in a hierarchical fashion. Which sequence correctly lists that hierarchy from least inclusive to most inclusive?

can obtain their food by eating other organisms.

Members of the kingdom Animalia

are photosynthetic.

Organisms belonging to the kingdom Plantae

whether any volunteers had colds at the start of the experiment.

Researchers set up a study to determine whether large doses of a nutritional supplement would shorten the length of time it takes to recover from a cold. Three thousand volunteers were split into two groups. For two weeks, members of group A took 3,000 mg of the supplement daily. Group B received 3,000 mg of a placebo (sugar pill). At the end of the two-week period, the researchers inserted live cold viruses directly into the noses of all the volunteers. The volunteers in both group A and group B continued to take their daily pills. All the volunteers got colds, and there was no significant difference in the length of time the colds lasted.To have confidence that the results of the experiment were valid, you'd also want to know

group A

Researchers set up a study to determine whether large doses of a nutritional supplement would shorten the length of time it takes to recover from a cold. Three thousand volunteers were split into two groups. For two weeks, members of group A took 3,000 mg of the supplement daily. Group B received 3,000 mg of a placebo (sugar pill). At the end of the two-week period, the researchers inserted live cold viruses directly into the noses of all the volunteers. The volunteers in both group A and group B continued to take their daily pills. All the volunteers got colds, and there was no significant difference in the length of time the colds lasted.Which was the experimental group?

the area never roaded serves as a control for the experimental variables of recontoured and abandoned.

Scientists interested in knowing the best way to restore an area after a temporary road was built through it completed a study comparing two treatments: (1) restoring the contour of an area so that there was no longer a depression or cut-through where the road was previously and (2) simply abandoning the area to allow vegetation to return on its own. They wanted to know whether either or both of these treatments would return the aboveground vegetation and the belowground soil properties to their original state, as seen in a similar area where there had never been a road.In this experiment, the area that had never had a road is useful to the experiment because

that obtain food by decomposing dead organisms and absorbing the nutrients.

The kingdom Fungi includes species

provide a basis of comparison to the experimental group.

The role of a control in an experiment is to

a result of natural selection as well as the connection between form and function.

The teeth of grain-eating animals (such as horses) are usually broad and ridged. This makes the teeth suitable for grinding and chewing. Meat-eating animals (such as lions) have pointed teeth that are good for puncturing and ripping flesh. This illustrates

community.

The tree in your backyard is home to two cardinals, a colony of ants, a wasp's nest, two squirrels, and millions of bacteria. Together, all of these organisms represent a(n)

testable and falsifiable.

To be scientifically valid, a hypothesis must be

Fungi

Which of the following is a group within the domain Eukarya?- Fungi, Bacteria, Archaea

Individual organisms experience genetic change during their life spans to better fit their environment.

Which of the following statements is not consistent with Darwin's theory of natural selection?- Individual organisms experience genetic change during their life spans to better fit their environment. Natural selection can lead to the appearance of new species. Factors in the environment result in some organisms having better reproductive success than others. Individuals in a population exhibit variations, some of which are passed from parents to offspring.

Bacteria are in a domain of their own

Which statement about bacteria is true?- Bacteria do not use the same genetic code as organisms in other domains. Bacteria are in a domain of their own. All bacteria are multicellular organisms. Archaea belong to the same domain.

Energy cycles from organisms through the atmosphere and back to the organisms.

Which statement about ecosystems is false?- Energy of sunlight is converted to energy stored in sugar molecules. Energy cycles from organisms through the atmosphere and back to the organisms. Carbon cycles from the atmosphere through organisms and back to the atmosphere. Most energy that enters the ecosystem leaves the system as heat.

Bacteria and fungi recycle energy within an ecosystem.

Which statement about ecosystems is false?- In the process of energy conversions within an ecosystem, some energy is converted to heat. Chemical nutrients cycle within an ecosystem. Bacteria and fungi recycle energy within an ecosystem. Plants and other photosynthetic organisms are producers in ecosystems.

Evolution can result in adaptations

Which statement about evolution is true?-Organisms evolve structures in response to needs. Individuals evolve within the span of their own lifetimes. Evolution is deliberate and purposeful. Evolution can result in adaptations.

Differences among organisms reflect different nucleotide sequences in their DNA.

Which statement about genetics is true?- Differences among organisms reflect different nucleotide sequences in their DNA. DNA is made up of six different kinds of nucleotides. Genes are proteins that produce DNA. Each DNA molecule is a single strand of nucleotides.

Organisms have an unchanging, constant internal environment.

Which statement about the properties of life is false?- Organisms have an unchanging, constant internal environment. Organisms have the ability to take in energy and use it. Organisms have the ability to reproduce. Organisms have the ability to respond to stimuli from the environment.

An organ system includes tissues.

Which statement best describes the relationship between a tissue and an organ system?

Because of hunting, organisms such as bears and wolves are fewer in number.

Which statement is not an example of evolution that has resulted from human activity?- Like certain other crops, domesticated strawberries are larger than wild strawberries. Because of hunting, organisms such as bears and wolves are fewer in number. Some insect species are now resistant to pesticides. Many strains of bacteria are now resistant to some commonly used antibiotics.

Through genetic engineering, a gene from a firefly can be inserted into a bacterium to make it glow.

Which statement provides the best evidence that there is a common genetic code that demonstrates the unity of life?- Bees, birds, and bats all have wings and fly. Through genetic engineering, a gene from a firefly can be inserted into a bacterium to make it glow. Many insects can pollinate only a particular species of plant due to many generations of evolutionary adaptation.

hypothesis

You notice that over the past month, many students on campus have started wearing a new style of school sweatshirt. You think to yourself that perhaps the bookstore has recently started selling this new sweatshirt style. This is an example of a(n)