Unit 1 Practice Test

A company that manufactures a popular multivitamin wanted to determine whether their multivitamin had any side effects. For the initial study, the company chose 2000 individuals to take their multivitamin tablets per day for one year. Scientists from the company surveyed the participants to determine whether they had experienced any side effects. The greatest problem with this procedure is that

In an experiment, the variable that is deliberately changed is the

Radon is a radioactive gas that seeps into homes from the soil. It is thought to be a cause of lung cancer. A research team investigates this theory. They gather large amounts of data on basement radon concentrations and lung cancer rates. They concluded that the more radon there is in a home, the more likely that people living in those homes will develop lung cancer. After the study was published, other researchers criticized it by asserting that the studied neighborhoods with higher radon concentrations also have a higher percentage of older people and a higher percentage of cigarette smokers than the low-radon neighborhoods. Both advanced age and cigarette smoking increase the risk of lung cancer. This criticism, if correct, shows that the radon study suffered from __________.

Two garden plots were planted with corn. The soil was similar in each, and equal amounts of water were applied to each plot. One plot was fertilized, and the other was not. The experimenters measured the yield of bushels of corn from each plot. The plot that did not receive the fertilizer was the ________.

The best method for determining whether bean plants require sodium is to ________.

A company was testing a new drug it thought would help decrease the risk of transmission of viruses from mother to fetus. In an experiment to test the compound, an investigator gave 400 pregnant female rats a small dose of experimental drug and inoculated each with a type of virus known to cause disease in rats. At the same time, 400 other pregnant rats were given only the virus. Of the rat pups born to females that received both the virus and the drug, 203 showed no symptoms of the disease; 205 rat pups born to the virus-only females showed symptoms. From this data, we can best conclude

In experimental procedures, repetition of the procedures ___________.

Should an experiment test only one variable at a time? Why or why not?

An experiment was designed to test whether students could squeeze a clothespin more times in one minute after resting or after exercise. The dependent variable for this experiment is

An experiment was designed to test whether students could squeeze a clothespin more times in one minute after resting or after exercise. The experimental result can be made more valid by

Which statement best describes a hypothesis?

A [blank_start]capsid[blank_end] is a protein coat that surrounds a virus.

A virus must infect a [blank_start]host[blank_end] cell before it can replicate.

In the [blank_start]lysogenic[blank_end] cycle the virus integrates its genetic information with that of the host and then becomes dormant, letting the host multiply and continue its normal activities.

In the [blank_start]lytic[blank_end] cycle a virus infects a host cell, uses its metabolism to multiply, and then destroys the cell completely.

Label the X-axis.

All of the following are characteristics of living things except the ability to

Which of the following is a fundamental unit of structure and function in living organisms?

The ability to keep blood sugar levels within a fairly narrow range, despite the intake of meals high in carbohydrates, is an example of

A [blank_start]retrovirus[blank_end] is a group of RNA viruses that use [blank_start]reverse transcriptase[blank_end] to replicate. [blank_start]Antibiotics[blank_end] cannot be used to treat viral infections, but [blank_start]vaccinations[blank_end] can be used to prevent them.

[blank_start]Homeostasis[blank_end] is the process of maintaining a stable internal environment. [blank_start]Feedback Mechanisms[blank_end] are used to regulate our internal environment around a [blank_start]set point[blank_end].

A dog rings a set of bells hanging on the door handle. The dog's owner gets up to let them outside. What is the Stimulus in this situation?

Complete the diagram below.

Find the mean, median, mode, and range for the following set of data: 33, 23, 44, 23, 67, 55 Mean: [blank_start]40.8[blank_end] Median: [blank_start]38.5[blank_end] Mode: [blank_start]23[blank_end] Range: [blank_start]44[blank_end]

There are two types of data that can be collected when conducting an exerpiment. [blank_start]Qualitative[blank_end] which are obervations made using your senses and [blank_start]Quantitative[blank_end] in which instruments are used to collect numerical data.

This is supported by a large body of evidence; explains how and why nature works.

Describes how nature works through the use of mathematical equations. Does not focus on the how or the why.

In a scientific experiment, the factors that stay the same through out the experiment are called...

The dependent variable is the variable that is being measured in an experiment.

In an experiment these are used to compare results to because we know they will not respond to the independent variable.

You know caffiene can have an impact on a person's heart rate. If you were to conduct an experiment to determine the effect caffiene has on a person's heart rate which item below would you use as your control?

What type of virus infects bacteria cells?

Which type of genetic material is most commonly found in viruses?

During the lysogenic cycle, what happens to the viral genetic material?

Viruses are specific to the types of cells they infect.

Which of the following it the correct order for increasing complexity?

The process of natural changes that take place during an organism's life is called ____.

Organisms that consist of one cell are said to be [blank_start]unicellular[blank_end], while organisms composed of many cells are said to be [blank_start]multicellular[blank_end].

[blank_start]Asexual[blank_end] reproduction consists one parent cell, while [blank_start]sexual[blank_end] reproduction requires two parent cells. Sexual reproduction happens at a [blank_start]slower[blank_end] rate than asexual reproduction.

Which one of these is NOT one of the characteristics of living things?

Living things require energy to survive. Which of the following is NOT an example of an organism requiring energy?

In order to maintain homeostasis, it is most important for an animal to be able to