Characteristics of Life
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The scientific term for a living thing is a(n)
Organism
All living things are
Organized
What is the simplest level at which life may exist?
Cell
What surrounds a cell and separates it from its environment?
Plasma membrane surrounds a cell and separate it from its environment.
What is the difference between unicellular and multicellular organisms?
Unicellular organism’s body is made up of one cell only while multicellular organism may comprise of hundreds or more cells.
Are all cells alike?
Cells may vary from each other.
Give an example of a multicellular organism and an example of a unicellular organism.
Bacteria is an example of a unicellular organism while dogs are multicellular.
Define reproduction.
Reproduction is the production of offspring and essential for the continuation of an organism’s species.
Must EVERY member of a particular species (one kind of organism) be able to reproduce for the species to survive? Explain why or why not.
Reproduction is not important for one’s survival. This is so because it is not a requirement. Many organisms survived even without being able to reproduce. This is also true to humans. However, reproduction is vital for the continuity of species.
What would happen if all individuals in a species were sterile (not able to have babies)?
This might be the end of the organisms’ species.
Reproduction is NOT essential for the survival of an individual’s _______but is essential for the survival of the ________.
Survival, Species
What is meant by extinction?
Extinction is the end of a kind of organism or species.
Name and define the two basic kinds of reproduction.
Sexual reproduction involves the union of sperm and egg cells. Asexual reproduction, on the other hand, does not need gametes or sex cells to reproduce.
What are the 7 characteristics of life?
Containing one or more cells, Reproduction, Growth and Development, Obtain and Use Energy, Respond to the Environment, Maintain Homeostasis, Evolve and Adapt
How do organisms begin life?
All organisms start their life as a single cell.
What is the difference between growth and development?
One way organisms grow is through an increase in the number of cells in their body, this is growth. Development, on the other hand, refers to the changes an organism must undergo during the course of its life.
Do unicellular organisms GROW? Do unicellular organisms DEVELOP?
Unicellular organisms do grow but they hardly develop.
Do multicellular organisms GROW? Do multicellular organisms DEVELOP?
Multicellular organisms do grow and develop.
How is the growth of a living thing different from the growth of a nonliving thing?
Growth of living things involved an increase in the number of cells. It means growth happens from the inside. Nonliving things grow by adding from the outside.
Define energy.
Energy is what enables organisms to do work.
Why is energy vital to a living organism?
Energy is important because it gives organism’s strength to make things done.
What is the difference between an autotroph and a heterotroph?
Autotroph can make their own food through photosynthesis while heterotrophs rely on another organism for food.
What is the name of the process that plants use to make their food using energy from the sun?
Photosynthesis is the process of making food (energy) for the plants using the sun’s energy.
What are some environmental factors (stimuli) that organisms respond to?
Air, water, weather, temperature and other living organisms are some examples of stimuli that organisms can respond to.