Microscopes
When carrying a microscope, what 2 parts should you hold it by?
the arm and the base
the variable the researcher intentionally changes
independent variable
a change in environment that leads to a response
stimuli
the basic unit of life
cell
chemical formula of water
H2O
The lenses that you look through, always 10x
ocular lenses
the variable that is measured as a result of the 'manipulated' variable
dependent variable
type of reproduction that produces offspring that are a combination of 2 parents
sexual reproduction
a collection of organs working together to carry out life's functions
organ system
type of bond that water forms with other water molecules (represented with a dotted line)
Hydrogen bond
The total magnification when using the highest powered objective lense
10x * 40x = 400x
what provides a baseline to compare results to
control group
a frog maturing from a tadpole or a caterpillar turning into a butterfly refer to which characteristic of life?
growth and development
specialized groups of cells are called ___
tissues
macromolecule made up of CHONP
nucleic acids
What 2 things do you need to do before you can remove a slide you are done viewing?
(1) rotate back to the lowest objective
then (2) lower the stage
are other factors that could affect the dependent variable
(researchers want to keep these variables the same in both the control and experimental groups)
controlled variables
organisms that make their own food, such as plants during photosynthesis are called __
autotrophs
How are population, community, and ecosystem different?
community - different species in a defined area
ecosystem - biotic and abiotic factors in a defined area
this specific kind of lipid forms cell membranes
phospholipids
What 3 slides did you look at during the microscope station
letter 'e'
skin/epithelial cells
onion root tips
Can you prove a hypothesis? Why or why not
No; only support or reject with evidence
What are the 8 characteristics of living things
(1) made up of cells (2) reproduce
(3) have DNA (4) grow and develop
(5) obtain and use materials/energy
(6) respond to their environment
(7) maintain a stable internal environment
(8) evolve (as a group) over time
list the 10 levels of biological organization from smallest to largest
(1) cell (2) tissues (3) organs (4) organ system
(5) organism (6) population (7) community
(8) ecosystem (9) biome (10) biosphere
have 4 levels of polymer structure
proteins