Biology - Ch 1

Which of the following statements about the domain Bacteria is true?

Archaea belong to this domain. All bacteria have a membrane-bound nucleus. All bacteria are multicellular organisms. All bacteria lack a nucleus.

Organisms that are prokaryotes are in the domains

Bacteria and Archaea. Plantae and Animalia. Eukarya and Archaea. Fungi and Bacteria.

Which of the following statements regarding a common cellular activity is false?

Cells respond to the environment. Cells develop and maintain complex organization. Cells regulate their internal environment. New cells are derived from cellular components like organelles.

Which of the following statements about evolution is true?

Individuals evolve within the span of their own lifetimes. Organisms evolve structures in response to needs. Evolution is deliberate and purposeful. Evolution can result in adaptations.

Which of the following statements is not consistent with Darwin's theory of natural selection?

Individuals in a population exhibit variations, some of which are passed from parents to offspring. Individual organisms experience genetic change during their life spans to better fit their environment. Factors in the environment result in some organisms having better reproductive success than others. Natural selection can lead to the appearance of new species.

Which of the following statements about the properties of life is false?

Organisms have the ability to take in energy and use it. Organisms have the ability to respond to stimuli from the environment. Organisms have the ability to reproduce. Organisms have an unchanging, constant internal environment

Which of the following is a kingdom within the domain Eukarya?

Viruses Fungi Archaea Bacteria

A theory is

an idea that has been proven. a concept in the early stages that still needs to be tested. a description of a belief that invokes the supernatural. an explanation of an idea that is broad in scope and supported by a large body of evidence.

Organisms belonging to the kingdom Plantae

are photosynthetic. obtain food by decomposing the remains of dead organisms and absorbing the nutrients. are unicellular and lack a nucleus. are multicellular and lack a nucleus.

Members of the kingdom Animalia

can obtain their food either by absorption or by photosynthesis. are composed of cells that lack a cell membrane. can obtain their food by eating other organisms. make their own food through photosynthesis.

In an ecosystem, energy

cycles along with chemical nutrients. typically flows from consumers to producers to decomposers. typically flows from producers through a series of consumers. comes ultimately from bacteria.

Life is organized in a hierarchical fashion. Which of the following sequences correctly lists that hierarchy from least inclusive to most inclusive?

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

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. 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?

group A only group B only all 3,000 volunteers the researchers that inserted the cold virus

Your instructor asks you to look into your microscope to see a prokaryotic cell. You will be looking for a cell that

has a nucleus. has a cell membrane with no nucleus. makes up most of the tissues of your body. is much larger than most cells in your body.

Which of these sequences is not a correct pathway of energy through an ecosystem?

insects → birds → bacteria plants → insects → birds plants → birds → bacteria bacteria → plants → birds

To be scientifically valid, a hypothesis must be

part of a theory. controlled. reasonable. testable and falsifiable.

The role of a control in an experiment is to

provide a basis of comparison to the experimental group. prove that a hypothesis is correct. ensure repeatability. counteract the negative effect of the experiment.

A scientist performs a controlled experiment. This means that

the experiment is repeated many times to ensure that the results are accurate. the experiment proceeds at a slow pace to guarantee that the scientist can carefully observe all reactions and process all experimental data. two versions of the experiment are conducted, one differing from the other by only a single variable. one experiment is performed, but the scientist controls the variables.

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

to be just as susceptible to that antibiotic as was the previous generation. to be more resistant to that antibiotic. to die out due to the drastic decrease in population size. to be more contagious than the prior generation.