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Diversity of life

Terms in this set (14)

How do you know if something is living?
It has to show all of the characteristics of life. Ex. Responds to the environment, reproduce, made of cells, needs food and water
A student saw something moving on the floor and exclaimed, "It's alive!" Write an argument that includes evidence and explains why you agree or disagree with this student.
Disagree, movement is not a characteristic of life. A plant is living and does not move while water is non living but can move. In order for something to be alive it has to have all the characteristics of life.
Some organisms can become dormant to survive in an unsuitable environment.
A student found a little pile of material that looked like tiny beads near a tree on her street. She thought that they were dormant organisms. What did she mean by that?
It means it is alive but inactive and in order to get it out of dormancy it must be placed in a suitable environment
Why is the cell the basic unit of life?
All living things are made up of cells. Cells also exhibit all the characteristics of life
All organisms carry out the functions of life. How do multicellular and single-celled organisms do this differently?
Both single-celled and multicellular organisms exhibit all the characteristics of life.
Multicellular organisms have organ systems. Whereas, single celled organisms have cell structures
Levels of Complexity
Atoms-molecules-cell structures-cells-tissue-organs-organ systems- multicellular organism
Life is classified into three domains (Archaea, Bacteria, Eukaryota), depending upon cellular and molecular characteristics.
Bacteria reproduce using Asexual reproductions
Bacteria and Archaea are Prokaryotes - No nucleus, no membrane-bound organelles and are singled celled
Eukaryotes - have a nucleus and membrane-bound organelles can be single celled or multicellular
Describe two roles that bacteria play in the environment.
Decompose dead organisms, make you sick, make food (yogurt), kill other bacteria
Describe two roles that bacteria play in the environment.Describe two roles that bacteria play in the environment.
Decompose dead organisms, make you sick, make food (yogurt), kill other bacteria
An elodea cell is not considered an organism, but a paramecium cell is. Explain why this is true.
An elodea cell is not considered an organism because it is part of a multicellular organism and needs other cells to survive. A paramecium cell is an organism because it can survive on its own.
The vascular system of plants consists of Xylem & Phloem
Xylem transports water
Phloem transports food
If you place a plastic bag over a branch of a tree that has leaves during a drought, would you expect to see a lot of water or just a little condensation in the bag? Explain your thinking.
If you place a plastic bag over a branch of a tree that has leaves during a drought, would you expect to see a lot of water or just a little condensation in the bag? Explain your thinking.
If you place a plastic bag over a branch of a tree that has leaves during a drought, would you expect to see a lot of water or just a little condensation in the bag? Explain your thinking.
If you place a plastic bag over a branch of a tree that has leaves during a drought, would you expect to see a lot of water or just a little condensation in the bag? Explain your thinking.
Most seeds germinate and grow in the dark. Why don't they need light right away?
What is the evidence for Fungi being most like Humans?
Both are Eukaryotes which mean they have a nucleus and membrane bound organelles
What is the evidence for Fungi being most like Humans?
Both are Eukaryotes which mean they have a nucleus and membrane bound organelles
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