Unit 1
What is science?
a process of gathering knowledge about the natural world
what is matter?
anything that has mass and takes up space
what are cells?
the basic unit of life
what is the cell cycle?
a series of events that cells go through as they grow and divide
what is a zygote?
a fertilized egg
What are the FIVE things you use to make an observation?
Sight, Smell, Taste, Touch, and Hearing
what is an ion?
an atom that has lost or gained one or more electrons
Name four parts of a cell and name their functions
what are the TWO differences of asexual and sexual reproduction?
Asexual- one parent; IDENTICAL offspring
Sexual- two parents; non identical offspring
what is the difference between an acid and a base
Acid- substances that release hydrogen ions (H+) in solution
Base- substances that release hydroxide ions (OH-) in solution
what is a hypothesis?
an educated guess from a set of observations
what is the difference between polar and non polar?
polar is the unequal sharing of electrons
non polar is the equal sharing of electrons
What does it mean when something is semi permeable
that some substances pass through
How many Mendel's principles are there?
Bonus: can you name them all
there are 4 in total
1- principle of inheritance
2- principle of dominance
3- principle of segregation
4- principle of independent assortment
the measure of concentration of H+ ions in a solution
What is the difference from a control group and an experimental group?
the control group is used for comparison and is exposed to the same condition as the experimental group, the experimental group is exposed the factor and being tested
adhesion is the attraction between molecules of different substances, what is an example of this?
water sticking to something else
a lipid has a hydrophilic head and a hydrophobic tail what does that mean?
the head is water loving and the tail is water fearing
What are on chromosomes?
DNA and Histone Proteins
what is the difference between a monomer and a polymer?
Monomer is a single part
mono means 1 hint
Polymer is many parts
what is the difference between the independent and dependent variable?
the independent is being deliberately changed
the dependent is the variable being measured
what are the four major groups of macromolecules?
Lipids (fats), carbohydrates, proteins, nucleic acid
Isotonic- same strength
Hypertonic- above strength
Hypotonic - below strength
where are genes located?
on chromosomes
list the levels of biological organization in order!
ATOM
MOLECULE
ORGANELLE
CELLS
TISSUE
ORGAN
ORGAN SYSTEM
ORGANISM
POPULATION
COMMUNITY
ECOSYTEM
BIIOSPHERE