Introduction to Biology
A proposed, testable explanation for an occurrence based on available data, observations, or evidence.
What is a hypothesis?
What is the organelle that converts food into energy for all eukaryotic cells? (powerhouse)
What is the mitochondria?
A hypothesis must be what in order to be useful to a scientist?
It must be testable.
Groups of the SAME organisms living in the SAME area are known as a
Population
The basic unit of all matter; smallest level of organization
Atom
In a controlled experiment, a scientist will test how many variables?
One
A student wants to measure growth of plants under certain amounts of light. At the end of the experiment, he measures the growth of each plant. In this experiment, what is the dependent variable?
Growth of plants
Combined portions of biotic and abiotic factors in an area.
What is an ecosystem?
Characteristic of life when pupils dilate to darkness?
What is response to stimuli?
Type of cells that do not have a nucleus
prokaryotic cells
A jelly like substance in which organelles are suspended.
Cytoplasm
What are the 2 types of data collected?
What are quantitative and qualitative?
When an organism obtains and uses energy.
metabolism
A student wants to measure growth of plants under certain amounts of light. At the end of the experiment, he measures the growth of each plant. In this experiment, what is the independent variable?
Amount of light
Type of mechanism used to maintain homeostasis in an organism.
feedback
What do scientists call the living and the nonliving factors in an ecosystem?
What are biotic and abiotic?
What is similar to a storage unit which stores water, salts, proteins and carbohydrates in a cell?
Vacuole
Name 4 structures found in both prokaryotes and eukaryotes.
DNA
cell membrane
ribosomes
cytoplasm
When substances move in and out of cells, they must go through what flexible, semi-permeable layer?
What is the cell membrane?
What is the membrane bound organelle in eukaryotic cells that hold DNA?
Nucleus
Which characteristic of life is maintaining a body temperature of 98.6 F?
What is homeostasis?
What parts of a controlled experiment are kept the same for both experimental and control groups?
What are the constants?
3 differences between plant and animal cells
cell wall and chloroplast (plants only)
centrioles (animals only)
When cells perform a certain role or function, what is it called?
Specialized
Name the levels of organization for cell to community.
cell, tissue, organ, organ system, organism, population, community