Characteristics of Life
What is the basic unit of life?
Cells
The charge of an electron is
negative
A pH of 2 would be considered _____
Bacteria are _______ microorganism
Unicellular
Presented that all plants are composed of cells
Matthias Schleiden
Asexual reproduction
an organism that divides themselves in two
What are two major areas of an atom?
Nucleus and the electron cloud
A pH of 8-9 is considered
Viruses are an
infectious agent that replicates inside a living cell of an organism
The father of evolution
Charles Darwin
Autotrophs
organisms that use energy from the sun to make their own food
What two parts make up the atomic mass?
protons and neutrons
What happens when you mix an acid with a base?
Neutralization reaction
How do bacteria reproduce?
Asexually
all animal cells are composed of cells
Theodor Schwann
What is homeostasis?
regulation of an organism's internal environment to maintain conditions suitable for life
Ionic bonds ________ electrons, and covalent bonds __________ electrons.
transfers
shares
A pH of 12-14 is considered
A strong base
How do viruses reproduce?
with a host cell
Cells come from preexisting cells
Rudolf Virchow
What do you have to have to be considered alive?
1. made of one or more cells
2. maintain homeostasis
3. grow and develop
4. reproduction
5. share similar characteristics
6. response to stimuli
7. requires energy
8. adaptations and evolve
If an atom has an atomic number of 15, and a mass of 25 how many electrons does it have?
15
What type of solution keeps the pH of organisms constant by preventing changes in pH?
Buffer solutions
Viruses always consist of
Protein coat
DNA or RNA
Who discovered the genetic principles?
Gregor Mendel
- Law of segregation
- Law of assortment