1 meter= ___ centimeters
100
An example of a stimuli that a plant would respond to is:
sunlight
What is considered complex and organized?
red blood cell in the human body
DNA is a molecule that directly allows a living thing to :
store information
The process of homeostasis is:
how organisms maintain a constant internal environment
Living systems need energy to:
�maintain constant internal invironment
�replace worn out parts
�grow larger
The complexity of living systems:
is also highly organized
Identify a characteristic that is representative of some, but not all, life-forms.
movement over great distances
The scientific method begins with...
observations that raise questions
What is true about a hypothesis?
An experiment can only support the possibility that the hypothesis is true;it cannot prove it to be true.
True or False. If the results of your experiment are inconclusive, it is time to design a new experiment.
True
What does it mean when we say that organisms are grouped to show evolutionary relations among them?
Organisms that are most similar are classified together.
Experimental group
The object the is being tested
An example of an epidemiological experiment?
Researchers look at the pattern of cancer development across populations in New England
Snakes, birds, frogs, and humans are all
vertebrates
One characteristic of living organism is the ability to maintain a fairly constant and self-regulating internal environment. What is the process called?
Homeostasis
An essential characteristic of life is that all living things are composed of cells.
True
Characteristics of all living things.
Respond to stimuli.
Have adaptive traits
contain carbohydrates, proteins, lipids, and nucleic acids
The great diversity of living organisms is evidence that there are NO unifying themes in biology.
False
Forwaard-lokking eyes are characteric of
primates
A trait that increases the chance that an organism will survive and reproduce in its natural environment is descrbed as being
adaptive
Members of the domains Bacteria and Archaea are called __ because tey lack a nucleus and internal compartments.
prokaryotes
Cells that possess a nucleus and a membrane system that establishes internal compartments beling in whcih of the folling groups?
Eukaryotes
Example of a population
All individuals of the same species in an area
Informed consent agreement
a document that lists all potential negative effects of participation in a study
Ecosystem
specific are as in which certain living organisms interact with their environment
Epidemiologic studies
these examine patterns within populations to find a correlation between a variable and its suspected effects
adaptive trait
a genetic trait that helps n organism survive and reproduce in its environment
Placebo
a non drug substance to look like a real drug
Critical thinking
the process of evaluating evidence and its source carefully before drawing conclusions.
Metabolism
the collection of all chemical reactions that occur in a cell
homeostasis
the ability to maintain a relatively constant internal environment
theory
a well-supported explanation for a particular scientific phenomenon
hypothesis
a testable explanation for an observation
The definition of a hypothesis?
possible explanation
How does a population differ from an ecosystem?
An ecosystem includes a community, wheras a population does not
Living organisms are members of all of the levels however rocks are example of
the ecosystem
Human health can be studied by looking at the patterns that occur in large populations.
True
A hypothesis is
a testable explanation for an observation
A statement such as, "If the human body temperature increases to a certain level, the critical proteins wil lbe denatured" would most likely be associated with
deductive reasoning
An athlete who uses dietary supplements will perform better than one who doesn't." This is an example of
hypothesis
Researchers testing new drugs usually give the drug to one group of people and give placebos, "sugar pills", to another group. The group receiving the placebo
is the control group
Which process used to solve problems in science involves accumulating facts through observation until the evidence leads a general statement about nature?
inductive reasoning
A critical thinker
asks more questions
The biosphere is that part of the Earth that supports life.
True
All internet websites with scientific data are reliable
False
a theory is
a wide-ranging explanation for natural events that has been extensively tested over time
A study shows that people who eat fish 3 times a week live longer. Based on this study, which of the following can you not conclude?
Eating fish causes longer life.
Humans belong in which domain?
eukarya
What is the highest level in the classification of life?
domain