Biology 1 test review Flashcards
What is a independent variable?
Variables that is changed (cause)
What is a dependent variable?
Variables that is affected by the change (effect)
Which level consists of a group of cells working together?
The tissue
Which level consists of groups of organisms?
The community level
What is a positive feedback loop?
When the product of a reaction leads to an increase in that reaction
What is a negative feedback loop?
Feedback that tends to stabilize a process by reducing its rate or output when its effects are too great
Which level consists of a specific type of animal, plant, fungus, protist or bacteria?
organism
Which level consists of groups of organisms as well as the physical environment they live in?
Ecosystem
What concepts refers to maintaining a stable internal environment
Homeostasis (constant blood sugar)
When your blood sugar levels are high, you produce more insulin to move glucose into your cells, When it is low you produce more glucagon to break down stored glucose. Is this positive or negative feedback?
Negative
When you cut yourself, your body responds by sending platelets to help clotting. These platelets turn into signals to send more platelets. Is this positive or negative feedback?
Positive feedback
What are the 4 macro molecules
Lipids, carbs, proteins, nucleic acids
What are present in all 4 organic macro molecules
Carbon
Why is carbon so important?
because it is abundant and light
What is the primary function of carbohydrates in both plants and animals
energy
what is the monomer unit of carbohydrate
monosaccharide
What elements make up carbohydrates
C,O,H
What molecule can be immediately used for energy by the cell
glucose
animals store excess carbohydrates (initially) in the form of
glycogen
what elements are found in lipids
C,H,O
plants store excess carbohydrates in the form of
starch and cellulose
What are the four functions of protein?
antibodies(protect), hormones(communicate), enzymes(speed & reaction), hair and nails, (structure)
what elements are found in proteins
C,H,O,N, (S)
What are the building blocks (smaller molecules) that make up proteins?
amino acids
