Life & Organization
The word "biotic" means...
Anything that is or once was living.
What are the two reasons for Mitosis?
Growth & Healing/Repair
What is Cell Specialization (Cell Differentiation)?
Different cells doing different jobs!
True or False: ALL living things do homeostasis.
TRUE: ALL living things do homeostasis!
Which system’s job is to digest and absorb nutrients?
Digestive System
What is Biology?
Biology is the study of life.
Mitosis produces (1 or 2), (identical or different) daughter cells.
Mitosis produces TWO identical daughter cells.
What do we call a segment of DNA that codes for a trait?
gene
What is homeostasis?
The ability of an organism to maintain a stable internal environment despite external changes.
Which system’s job is to support your body?
Skeletal System
Is fire biotic or abiotic?
Abiotic
If a daughter cell contains 16 chromosomes, how many chromosomes will its parent cell have?
16 chromosomes
Why is it beneficial for organisms to have several cells (be multicellular)?
They can be more complex and efficient.
Eating food raises blood sugar, which triggers the pancreas to release insulin. Insulin helps cells absorb glucose, lowering blood sugar back to normal levels. Is this an example of positive feedback or negative feedback?
Negative Feedback
Which system’s job is to move your body?
Muscular System
List the levels of organization from smallest to largest.
Cell, Tissue, Organ, Organ System, Organism
Draw the product(s) of Mitosis based on the parent cell that I draw on the board...
I will draw the correct answer!
If all of the cells in our body have the same DNA, how do the cells in our body do their different jobs?
Certain genes turn on and off like a light switch.
When a blood vessel is damaged, platelets stick to the site and release chemicals that attract even more platelets until the wound is sealed. Is this an example of positive or negative feedback?
Positive Feedback
Which system’s purpose is to transport oxygen and nutrients to and from all the cells in the body?
Circulatory System
List the 8 true characteristics of life.
Made of cells.
Obtain and use energy.
Respond to their environment.
Grow and Develop.
Reproduce.
Have levels of organization.
Adapt through evolution.
Maintain homeostasis.
Gabby broke her wrist playing basketball. How did her wrist heal?
Bone cells divided to heal her wrist.
What is a stem cell?
A cell that does not have a specific job yet - the genes in the cell’s DNA have not been turned on or off yet.
Cacti that live in a dry, hot environment get very little water. When do they open their stomata?
Cacti open their stomata at night - this way they do not lose as much water!
Which system’s job is to do gas exchange for the body by taking in oxygen and releasing carbon dioxide?
Respiratory System