Biology Chapter 1

Genetic information in DNA is encoded in sequences of how many different molecular "letters".

4 (A, G, C, and T.)

What is required of a scientific study for it to be considered a controlled experiment?

A comparison between at least two groups, one receiving a specific factor of interest and the other not receiving this factor

Which of the following best describes emergent properties?

A property that is not present in the parts but is present in the whole

Which of the following is an example of a conclusion not based only on anecdotal evidence?

A single drug trial suggests that in a random sample of 2000 individuals those receiving the drug recovered from flu an average of four days sooner than those receiving only a placebo (a pill not containing the drug).

Which of the following is not a feature of natural selection?

All individuals in a population have equal reproductive success.

Which of the following depicts the correct order of levels in biological organization from broadest to most specific?

Biosphere -> ecosystem -> communities -> populations -> organismsorgan and organ system -> tissues -> cells -> organelles -> molecules and atoms

What question should be asked in determining whether a source is reliable? A. Are any experiments described in enough detail thatthey could be reproduced? B. Is the intent of the source known? C. All of the listed questions should be asked of any tentative source of scientific information. D. Is the information current?

C. All of the listed questions should be asked of any tentative source of scientific information.

Which of the following is a false statement? A. Producers absorb sunlight. B. Consumers consume other organisms. C. Energy from the sun is used up by photosynthetic organisms. D. Energy flows through an ecosystem.

C. Energy from the sun is used up by photosynthetic organisms.

Why are cells considered the smallest unit of life?

Cells are the smallest things that have all the characteristics of life.

Why is On the Origin of Species by Means of Natural Selection important in biology? A. It proposed a mechanism for descent with modification, called natural selection B. It presented evolution as a unifying theme that explains common characteristics found throughout diverse species C. It provided a large amount of evidence that supported the evolutionary view that species descended from a common ancestral species. D. all of the above

D. all of the above

Which of the following is a false statement? -Energy from the sun is used up by photosynthetic organisms.-Energy flows through an ecosystem. -Consumers consume other organisms. -Producers absorb sunlight.

Energy from the sun is used up by photosynthetic organisms.

Which of the following statements best distinguishes hypotheses from theories in science?

Hypotheses are tentative guesses whereas theories are comprehensive explanations supported by evidence.

Which of the following statements best distinguishes hypotheses from theories in science? -Hypotheses are tentative guesses whereas theories are comprehensive explanations supported by evidence. -Hypothesis and theory are interchangeable terms. -Hypotheses are tentative answers to questions whereas theories explain nature. -Theories are hypotheses that have been proven.

Hypotheses are tentative guesses whereas theories are comprehensive explanations supported by evidence.

In nature, ________ and ________ are related so that ________.

In nature, ________ and ________ are related so that ________.

Which of the following depicts the correct order of the scientific method?

Observation -> question -> hypothesis -> prediction -> experiment

Which of the following is a typical aspect of peer review in the process of scientific publication?

Revision of the written descriptions of experiments, or even the experiments themselves, is often required before a paper is recommended for publication.

You walk into a room and flip the light switch but the light in the room does not turn on. You flip it a few more times to make sure it isn't working. You decide the bulb must be dead and replace it. Yet after you put in the new bulb and flip the switch, the light still doesn't turn on. Looking around the room, you notice that several electronic devices are also not working. You go to check the fuse box and find that the breaker needs to be switched on. After doing so, you flip the light switch in your room and this time the light comes on. Which of the following represents a hypothesis from this scenario?

The bulb is dead, so the light will not turn on.

Which property or properties of life does water have?

Which property or properties of life does water have?

A family tree showing evolutionary relationships among species is best viewed as ________.

a hypothesis

In scientific exploration, data are ________.

any collected evidence on which scientific inquiry and hypothesis testing is based

Which of the following is not a property of life?

breathing

The metabolism of a living organism is its ________

interconnected network of chemical reactions

Mutations occur according to what pattern?

mutations occur randomly

A double-blind experiment is one in which ________.

neither the experimenter nor the participants know which individuals are receiving which treatment

Groups of interacting individuals of one species are called a/an ________.

population

In an experiment, an independent variable is ________.

what is being manipulated by the researcher to investigate its effect on some other variable