Unit One
Which practices add to scientific knowledge?
inferring, predicting, drawing conclusions
Define Ethics.
Define Gene.
a section of DNA that affects traits
Fossil records often show extinct organisms that are similar to current species. These species are often _[blank]_ modern species.
What words correctly completes the last sentence?
ancestors of
When a group of meerkats is looking for food, one individual meerkat stands guard.
The guard warns the group if a predator is approaching. This allows meerkats to find food more safely.
Ralph is making a survey about comic books. He chooses to give the survey only to boys. He does this because he thinks comic books are not popular with girls.
Which option correctly identifies a problem with Ralph’s process?
Ralph has made an assumption that is based on a bias.
According to the safety guidelines, what should you do if iodine gets in your eyes?
Rinse your eyes thoroughly with water for five minutes.
Marty flips a coin three times.
What is the chance that all three flips end up being heads?
1/8
Which statement expresses observations that Darwin made during his voyage?
Different finches were found on each of the Galapagos Islands.
define innate behavior.
an activity or behavior that occurs naturally in an organism
Around the mid-17th century, Robert Hooke observed part of a cork tree with a simple microscope. He realized that the cork consisted of small, box-like parts. He called these box-like parts cells. In the late 17th century, one-celled organisms were first observed with a microscope. Until that time, nobody knew that microscopic life forms existed.
In the 19th century, improved microscopes and processes were used. This led to the discovery that animal tissues were also made of cells. In addition, 19th-century scientists observed how new cells formed. They realized that cells always form from cells that already exist. Scientists also discovered that living cells could carry out certain chemical reactions.
Which option correctly explains how the cell theory was formed?
Scientists’ understanding of cells continually improved as the results of studies built upon each other over time and formed the cell theory.
A group of scientists decides to conduct research to see whether access to a higher amount of a certain vitamin will improve the health of lab rats. They raise more than 500 rats, giving some the extra vitamin and some not, and keep track of how often the rats are sick and how long they live. The scientists’ findings are positive; the rats are healthier and live longer when they have access to the vitamin.
Which option correctly identifies why this research was scientific?
The scientists’ question was testable, and their claim was based on evidence.
Which term is defined as a genotype composed of two identical alleles?
homozygous
Which statement describes Lamarck’s work?
Lamarck hypothesized that an organism's traits changed based on what the organism did or needed. The improved trait was then passed on to its offspring.
Which statement defines behavioral cycle?
a behavior that repeats at regular intervals