Exam 1: The Nature of Science

When scientists generate a single informed,logical,and plausible explanation for a question and observations of the natural world,they are proposing a scientific

Which of the following questions could NOT be used to develop a testable hypothesis?

Once supported by a predictable experimental outcome,a scientific hypothesis

The hypothesis that there is a common ancestor to all living organisms is strengthened by what observation?

When Dr.Blehert and his team set out to determine the cause of death for thousands of bats,they determined that the sick and dead bats had a strange white fuzz on their noses and wings along with depleted fat reserves and damaged wing tissue.After performing observational studies,the researchers used a branch of mathematics called ________ to quantify the reliability of their data.

Which of the following sequences correctly represents the biological hierarchy of a multicellular organism?

Researchers hypothesized that a North American fungus not only caused symptoms of white-nose syndrome (WNS)but also caused death.The results from their experiment are shown in the graph below.Based on this graph,which of the following hypotheses would be the MOST logical hypothesis for further studies?

Carbon,hydrogen,and oxygen atoms are held together by chemical bonds to form ________ of sugar.

Recently,beekeepers have noticed an alarming and sudden disappearance of honeybees from their hives.Some beekeepers and environmentalists worry that crops genetically engineered to produce Bt insecticidal toxin may be killing the bees.Which of these experiments tests the hypothesis that Bt toxin is killing the bees?

Explain the self-correcting nature of science.

A tissue is defined as

The information presented in the following figure represents a scientific

A parent heard a celebrity on television stating there was a study published in 1998 that asserted a connection between the measles-mumps-rubella (MMR)vaccine and the onset of autism in children.The celebrity went on to say that after the MMR vaccine replaced the old simple measles vaccine in 1988 there was a 273 percent increase in autism rates during the next 11 years.The celebrity,however,did not reveal that the study published in 1998 included a sample size of 12 children who were already known to have some form of autism or similar developmental difficulties.He also did not present the evidence from hundreds of studies conducted since 1998 that show no connection between vaccines and the onset of autism.What was the hypothesis,regarding vaccines and autism,implied by the celebrity? State at least two obvious problems with the structure of the 1998 study.

A researcher studying a group of individuals of the same species living and interacting in a shared environment is said to be working at the level of a

What characteristic is NOT shared by all living organisms?

Bats use echolocation to orient themselves and locate objects.Doing this requires special adaptations in their inner ear,midbrain,and auditory cortex of their cerebrum.The echolocation system of bats is an example of a(n)

The first two steps of the scientific process typically include making ________ and forming a ________.

Living organisms maintain a constant internal environment by sensing and responding to their internal conditions.This stable maintenance of internal conditions is known as

New medications undergo extensive human testing before receiving FDA approval.These tests represent an experiment,and variations in the dosage given to participants represents the

David Blehert and his research team captured 117 healthy bats to study in the laboratory and divided them into four groups.Group 1 was housed in an area free from Geomyces destructans.Group 2 was housed in an area that shared the same air as bats infected with WNS,but these bats did not have direct contact with the infected bats.Group 3 was housed in direct contact with other bats infected with WNS.Bats in group 4 were directly exposed to Geomyces destructans when researchers applied it to the bats' wings.During the study period the bats were monitored for signs of WNS.What is the specific hypothesis being tested by the inclusion of group 4 in this experiment?