Unit 1 Topic 1- The Science of Life Flashcards
the ___is the basic unit of life?
cell
unicellular?
organisms that are composed of only 1 cell
Multicellular?
organisms composed of more than 1 cell
What do cells contain tha carry out the cells life processes?
specialized structures called organells
what are all living things composed of?
cells
Multiellular: begin as___cell, contain___cells and___kinds of cells?
- 1
- many
- different
In multicellular organisms, cellsdifferentiate to become what that then becomes a what?
- specific tissue
- organism
What is homeostasis?
stable level of internal conditions
Do all living things need homestasis?
yes
Do all organisms reproduce?
yes
Reproduction is just the ___of__info to their offspring?
transmission
hereditary
What form does the transmission of hereditary information take in reproduction?
DNA or DNA like structure
In sexual reproduction info from how many organisms is passed down to offspring?
2
In a-sexual reproduction info from hw many organisms is passed down?
1
What is natural selection?
the theory that organisms that have certain favourable traits are better able to reproduce than organisms that lack these traits.
what is the most important driving force in evolution?
natural selection
Evolution by natural selection is driven in part by the____necessary for survival?
competition
Are all individuals able to reproduce to the same degree?
no
Do individual that have traits that give them advantages for survival and reproduction tend to pass these traits down?
yes
What is responsible for the multitude of life forms we see today?
descent with modification