Characteristics of Living Organisms
Which characteristic of life can be defined by the following: Organisms pick up information about changes in their environment, and react to the changes.
Sensitivity
Cells
All plant cells are surrounded by a ___________ made mainly of cellulose.
Cell wall
The ______ is where genetic information is stored. It contains DNA in the form of chromosomes.
Nucleus
These are very small structures in a cell that use information on DNA to make protein molecules.
Ribosomes
Which characteristic of life can be defined as: All organisms produce unwanted or toxic waste products as a result of their metabolic reactions, and these must be removed from the body?
Excretion
A _______ can be used to view very small objects.
Microscope
Because of the large spaces between fibers of the cell wall, even very large molecules are able to pass through. Therefore, it is fully __________.
permeable
________ are small structures found inside some plant cells, inside which photosynthesis takes place.
Chloroplasts
Name two structures that are found only in plant cells (not animal cells).
1. Chloroplasts
2. Cell Wall
What is an organism? Give three examples.
A living thing (examples: platypus, bacterium, mango tree, cat, human, etc.)
A photograph taken using a light microscope is called a _________.
Photomicrograph
The jelly-like material that fills a cell.
Cytoplasm
These are small structures in a cell where aerobic respiration releases energy from glucose (the POWERHOUSE of the cell).
Mitochondria
Chloroplasts are green because...
They contain a green coloring, or pigment, called chlorophyll.
Organisms use the energy that they obtain from (this process, characteristic of living things) to make other chemical reactions in their cells.
Respiration
Every cell has a __________ around the outside. (Hint: plant AND animal cells have this)
Cell membrane
Chemical reactions that take place in living organisms are called _______ reactions.
Metabolic
_______ respiration occurs in mitochondria. This includes chemical reactions that take place in mitochondria, which use oxygen to break down glucose and other nutrient molecules to release energy for the cell to use.
Aerobic
The fluid that fills the large vacuoles in plant cells is called _______.
Cell sap
List the seven characteristics of living organisms.
Movement
Respiration (breaking down glucose into energy)
Sensitivity
Growth
Reproduction
Excretion
Nutrition
Permeable
A _______ is a fluid-filled space inside a cell with is surrounded by its own membrane. (Hint: Plants have large ones that are filled with cell sap; they help keep the plant's shape).
Vacuole
Animal cells have much smaller vacuoles than plant cells, called __________, which contain solutions.
Vesicles
Many