biology test 1


a localized group organisms that belong to the same species is called an

All the organisms on your campus make up


which of the following statements is true regarding the complexity of biological systems

Knowing the function of a component of a living system can provide insights into the structure and organization of the living system.

Systems biology is mainly an attempt to

understand the behavior of entire biological systems

Which branch of biology is concerned with the naming and classifying of organisms?


Which of these provides evidence of the common ancestry of all life?

near universality of the genetic code

which of the following is true of natural selection

It requires genetic variation, results in descent with modification, and involves differential reproductive success.

which of the following is not one of Darwin's observations?

a population avoids competition by producing only as many offspring's as can successfully reproduce on their own

The evolution of one species into two or more species as a result of different populations becoming reproductively isolated from each other is best termed as

adaptive radiation

Following a scientific method, which of the following is the correct order of steps?

observation-hypothesis-experiment-analysis-conclusion-communicate results

the best experimental design

includes a large sample size and a control, and alters only one condition between the controls and the experimental condition

a controlled experiment

includes at least two groups, one of which does not receive the experimental treatment

A scientist, who wants to study the effects of nitrogen on wheat plants, sets up an experiment with 4 groups of wheat plants: group A gets 20 pounds per acre, group B gets 40 pounds per acre, group C gets 60 pounds per acre, and group D gets 0 pounds per acre. Which of the following is the control group?

group D

which of the following statements best distinguishes hypthese from series in science?

Hypotheses usually are relatively narrow in scope; theories have broad explanatory power.

which of the following best describes the logic of scientific inquiry?

if my hypothesis is correct, I can expect certain test results.

which of the following statements is true regarding evolution

evolution is the process of change over time that has resulted in the array of organisms found on earth

which of the following is not a property associated with all living organisms?


What is the correct order for the hierarchy of biological organization from the least to the most complex?

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

Which of the following attributes is common to both prokaryotic cells and eukaryotic cells?

the use of DNA as the information storage molecule.

Cells are

characteristic of prokaryotic and eukaryotic organisms

Which of the following order is correct in terms of the hierarchy of the organization?

biosphere-ecosystem-community- population-organism

When your body temperature rises on a hot day, the neural and hormonal mechanisms activate sweating. Evaporation of sweat leads to cooling of the body surface. This is an example of ________.

negative feedback regulation

Competition is central to the theory of natural selection. Why does competition occur?

organisms typically reproduce too many offspring and resources are limited.

Plants convert

sunlight and chemical energy

Which of the following statements is not true of scientific experiments?

they must occur under carefully controlled condtions

In an experiment, investigators try to control all of the variables except oneā€”the one that tests the hypothesis. Which of the following reasons is the primary rationale for controlling variables in an experiment?

to eliminate alternative explanations for the results of an experiment.

Which of the following statements could not be supported or rejected by a scientific experiment?

The first living cell on Earth came from outer space.

Which of the following statements is true of a hypothesis?

A hypothesis can be supported or rejected through experimentation.

Which of the following variables did Pasteur change in his experiment to test the hypothesis of spontaneous generation?

the shape of the flask

In Pasteur's experiment to test the hypothesis of spontaneous generation, why did he boil the broth in both flasks?

to kill any exsiting organisms in the broth

Suppose that Zonosemata flies whose own wings had been clipped and reattached were attacked more frequently than untreated Zonosemata flies. How would this result affect the reliability of the other experimental results?

All results for the experimental groups involving wing surgery would be invalid.

How does scientific theory differ from a scientific hypothesis?

Theories are usually an explanation for a more general phenomenon Hypotheses will typically address more specific issues

Which of these is an example of inductive reasoning?

Hundreds of individuals of a species have been observed and all are photosynthetic; therefore, the species is photosynthetic.

what should you do next

Perform experiments to test your hypothesis.

Which of the following experiments would best test your hypothesis?a. Ask your friends if they also like the same type of music that you like.b. Interview all of your friends and find out if the ones born in other weeks also like the same types of movies that you like.c. Find other people born in the same week and ask them what their favorite type of movie is.d. Find other people born in the same week and tell them what your favorite movie is. Ask them if they also liked that movie.

Find other people born in the same week and ask them what their favorite type of movie is.

A controlled experiment is one that

tests experimental and control groups in parallel


Consists of all life on Earth and all parts of the Earth in which life exists, including land, water, and the atmosphere.


A biological community of interacting organisms and their physical environment.


All the different populations that live together in an area


A group of individuals that belong to the same species and live in the same area


Any living thing


A structure consisting of several tissues adapted as a group to perform specific functions.

organ system

group of organs that work together to perform a specific function


A group of similar cells that perform the same function.


The basic unit of structure and function in living things


A tiny cell structure that carries out a specific function within the cell


Changes in physical structure, function, or behavior that allow an organism or species to survive and reproduce in a given environment.


Change over time


The arrangement of parts in an organism


process by which organisms maintain a relatively stable internal environment


the ability to do work

From broad to specific