Unit 1 The Study of Life Flashcards
includes all living things on Earth
Biosphere
Where is more life found?
More life is found near the equator
Why is there more life near the equator?
Warmer climate/ no seasons
T/F: Every part of the biosphere is connected
True
one particular type of living things
species
T/F: All organisms do not have certain characteristics
False
All organisms DO have certain characteristics
scientific study of all forms of life
Biology
any living thing
organism
What are the 4 qualifications to be a living thing ?
-Made of 1 or more cells
-need energy for metabolism
-respond to their environment
-all pass DNA to their environment
All levels of life have _______ of related parts.
systems
an organized group of interacting parts
system
system of chemicals and processes
cell
includes organs that interact
body system
includes living and nonliving things
ecosystems
T/F: Structure and Function are related in biology
True
What determines function?
Structure
T/F: Proteins with different structures perform the same functions.
False
Proteins with different structures perform different functions.
What has a different structure and function than stomach muscle cells?
Heart muscle cells
Different _____ have different animatic shaped with different functions
species
What must organisms maintain to survive in diverse enviroments?
Homeostasis
the maintenance of constant internal conditions
Homeostasis
How is homeostasis usually maintained?
Through negative feedback
What do negative feedback systems do?
Return a condition to its normal (set.) point
What can help maintain homeostasis?
Behaviors and Adaptations
What is observing?
Using the senses of tool to gather info
What is forming a hypothesis?
Asking a question that tries to explain the observations
What is testing a hypothesis?
collecting data to support or reject hypothesis
What is analyzing data?
a statistical analysis of data to draw conclusions
What is evaluating results?
data + conclusions are studies to determine validity
What is an experiment?
use ind. + dep. variables to find cause and effect relationships
Independent variables are…
manipulated
Dependent variables are…
observed and measured
What is a constant?
any condition kept the same to see the effect of the cause
a proposed explanation for a wide range of observations + experimental results that is supported by a wide range of evidence
theory
Can theories change?
Yes
What does imaging technology provide?
Provides an enlarged image of an object
shines light through a specimen + has 2 lenses to magnify an image
light microscopes (LM)
Can the specimen be alive for a light microscope?
yes
passes a beam of electrons over the specimens surface to show a 3-D image
scanning electron microscopes (SEM)
What two microscopes does there have to be a vacuum room?
Scanning electron microscopes (SEM)
Transmission electron microscope (TEM)
What microscope do you have to spray your specimen with metal?
Scanning electron microscopes (SEM)
Can your specimen be alive with a Scanning electron microscope (SEM)?
No
passes a beam of electrons through a thin slice of specimen to show a 2-d image
Transmission electron microscope (TEM)
What microscope do you have to spray your specimen with glue?
Transmission electron microscope (TEM)
Can your specimen be alive with a Transmission electron microscope (TEM)?
No
Increase of an object’s apparent size
Magnification
power to show details clearly in an image
Resolution
single, standard of measurement based on powers of 10
Metric System
a segment of DNA that stores genetic info
Gene
