Characteristics of life
Cell structure
Diffusion/Osmosis
Cell theory
cell transport/membrane
100
Which life activity is not required for the survival of an individual organism
reproduction
100
Which cell structure is mainly responsible for releasing energy from food molecules in some single-celled organisms?
mitochondria
100
It is a type of passive transport which involves the movement of substances from a high concentration area to a low concentration area.
diffusion
100
The combined observations of Hooke, Schleiden, Schwann, Virchow & Von Leeuwenhoek helped form:
cell theory
100
What does semi-permeable mean?
Some molecules can move through the membrane
200
Some processes that occur in a cell are listed below.
A. utilize energy B. detect changes in the environment C. rearrange and synthesize chemical compounds
Which processes will all living organisms use to maintain homeostasis?
A, B, and C
200
The diagram below represents levels of organization in living things.
Which term would best represent X?
the tissue
200
A difference in the concentration of a substance across a space or between two solutions is called
concentration gradient
200
Which of the following statements is NOT part of the cell theory?
1. Cells are the basic unit of structure & function in all living things.
2. All cells are made from other cells.
3. Only animals are made of cells.
4. All living things are made of cells.
3. Only animals are made of cells.
200
Which type of transport requires an input of energy?
active transport
300
Which term is defined as all the chemical reactions that are required to sustain life?
metabolism
300
The respiratory system of an elephant functions
in a similar way to which organelle in a single-
celled organism?
plasma/cell membrane
300
When molecules are evenly distributed throughout the cell, they are said to be in
equilibrium
300
When cells are damaged, new cells are created by cell division. How does the cell theory support this fact?
When cells are damaged, new cells are created by cell division. How does the cell theory support this fact?
300
Movement of molecules from an area of high concentration to an area of low concentration is
diffusion
passive transport
osmosis
400
In a living cell, which compound serves primarily as a substance in which most molecules and ions are dissolved?
water
400
A characteristic shared by all enzymes, hormones, and antibodies is that their function is determined by the...
shape of their molecules
400
A solution in which the concentration of dissolved substances is lower than the concentration inside a cell is
hypotonic
400
Looking at a cell under a microscope, you note that it is a prokaryote. How do you know?
the cell lacks a nucleus
400
What is the difference between active and passive transport?
Active uses ATP (energy) and passive does not need energy
500
If you find an object that seems alive, how might you determine if the object is indeed an organism?
a living thing that has an organized structure, can react to stimuli, reproduce, grow, maintain homeostasis, and it eats and moves on its own
500
What is the main difference between prokaryotic and eukaryotic cells?
Prokaryotic cells do not have a nucleus, Eukaryotic cells do have a nucleus.
500
this egg has shrunk, what type of solution was it placed in?
hypertonic solution
500
What is one way in which all living things on Earth are alike?
All living things are made of cells & come from other cells.
500
The membrane itself is hydrophobic in the inner layers and doesn't allow water-soluble molecules to pass, yet water itself can permeate cells. Why?
Channels called aquaporins in the membrane allow water molecules to pass through freely.