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☆ Science Exam ☆
4.1 and 4.3
Terms in this set (36)
true or false : scientists found cells by accident
the smallest structural and functional unit of living things
who was Robert Hooke?
first person to describe cells (Studied a thin slice of cork from a tree)
what does cell mean in Latin?
why did Hooke think that animals didn't have cells
because they lacked cell walls (they weren't as easy to see)
who was Anton van Leeuwenhoek?
a Dutch merchant who discovered protists with his microscope (studied pond scum)
He was the first person to see bacteria
what is the cell theory?
all organisms are made up of one or more cells
the cell is the basic unit of all living things
all cells come from existing cells
fill in the blank : it would take _________ human cell's to cover the dot on this letter i
why are cells so small?
surface area to volume ratio ( if a cell gets too large, the cell's surface area will not be large enough to take in enough nutrients and pimp out enough wastes.
one of the small bodies in a cell's cytoplasm that are specialized to perform a specific function
fill in the blank : DNA gives the cell's ___________________ on how to make proteins
what are the two basic types of cells?
eukaryotic and prokaryotic
a single-celled organism that does not have a nucleus or membrane-bound organelles; examples are archaea and bacteria
true or false : eukaryotes are around 10 times as large as most prokaryotic cells
an organism made up of cells that have a nucleus enclosed by a membrane; eukaryotes include protists, animals, plants, and fungi but N O T archaea and bacteria
anything that can perform life processes by itself
an organism made up of one cell
what are two advantages of being unicellular rather than having many cells?
need less resources to live
can survive in harsher conditions
organisms made of many cells
fill in the blank : as a cell develops into many cells, it becomes __________________
what are two advantages for having a larger size?
pray to fewer predators
wider variety of pray to eat
why do multicellular organisms have longer lives?
they don't die even if one of their cells does unlike unicellular organisms
the special activity of an organ or part
the arrangement of parts in an organism, including the shape and material of which the part is made
describe the structure and function of guard cells in some plants
structure - shaped liked sausages
function - control the size of openings called stoma
A collection of similar cells that perform a common function
what are four basic animal tissues?
what are the three basic plant tissues?
a structure that is made up of two or more tissues working together to perform a specific function
name three types of tissue that make up the heart
cardiac muscle tissue
blood vessel tissue
what organ in plants traps sunlight to make food?
a group of organs that work together to perform a particular function
what is the organ system that uses organs and tissue such as the heart and blood vessels?
name three organ systems found in plants
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