Characteristics of Life (COL)
All organisms need to adapt to their environment in order to survive and pass down their genes. This is an example of _______________.
Evolution
What is the definition of homeostasis?
A self-regulating process by which a living organism can maintain internal stability while adjusting to changing external conditions.
Organelles
Water molecules sticking to one another is an example of ______________.
Cohesion
Jumping when you hear a loud noise, or a plant turning towards the sun are examples of ____________.
Response to stimuli
Explain how body temperature is an example of a negative feedback loop.
When your body temp gets high, your brain sends a signal to your body to start sweating, when your body temp gets low, your brain sends a signal to your body to start shivering.
Prokaryotic cells are unicellular which means they have _____________ cell(s). Eukaryotic cells are multicellular which means they have _____________ cell(s).
One, many
_________________ occurs at the interface between water and air. Water molecules at the top are pulled towards the other water molecules beside and below them.
Surface Tension
What is the difference between evolution and growth & development?
Evolution occurs over a very long period of time and the growth & development (life span) of an organism is a short amount of time
Explain how child birth is an example of positive feedback.
Baby wants to get out, the body sends a signal to the brain. The brain pumps out a chemical that helps speed up contractions. The contractions get faster until the baby comes out.
This organelle is present in plant cells but absent in animal cells (hint -- there are 2).
Cell Wall or Chloroplast
Water sticking to non-water molecules is an example of ______________.
Adhesion
Explain biological organization.
A bunch of cells make up tissues, tissues make up organs, organs make up an organ system, organ systems make up an organism.
Nancy is feeling sick so she goes to the ER to get IV fluids. When the nurse sets up her IV bag, she gives her distilled (pure) water instead of a saline solution. Why is this dangerous? Use hypotonic or hypertonic in your response.
Because Nancy's blood cells will swell and burst because there is too much water on the inside, diluting her sodium levels. It is a hypotonic solution.
These organelles make proteins and may be found attached to the endoplasmic reticulum.
Ribosomes
Why are water molecules attracted to each other?
Hydrogen Bonds: the hydrogen end wants to bond with the oxygen end.
What is the definition of metabolism?
The process in which an organism is able to utilize nutrients/molecules to produce energy.
Which disease shows us that the disruption of feedback mechanisms (positive or negative) in organisms often has negative consequences.
Diabetes
Which types of cells have membrane bound organelles? Why is this important?
Eukaryotic cells (animal, plant, fungi) have membrane bound organelles. This is important because it gives the organelles an extra layer of protection, making it harder for bacteria/viruses to disrupt cellular processes.
Why is adhesion important for living organisms like plants?
Because if a plant absorbs too much water it could die