Cells
The basic unit of living things
2 examples of unicellular organisms & multicellular organisms
unicellular: amoeba & bacteria
multicellular: animals and plants
the human body is made of _______ cells
100 trillion
Different types of cells in the human body have different __________
sizes, shapes and functions
what makes a leaf green?
chloroplasts
which type of cells have no nucleus or chromosomes
red blood cells
Which 3 structures only appear in plant cells
cell wall, vacuole, chloroplast
DNA (deoxyribonucleic acid)
·determines what features we receive from our parents
·contains all instructions needed for the cells to carry out activities
-so that our body can grow, reproduce and function
Every cell contains __ pairs of chromosomes (22 pair of ______, 1 pair of _______)
23, autosomes, sex chromosome
chromosomes: ?
DNA: ?
-> chromosomes: thread-like structures made of DNA and proteins
-> DNA coils up and wraps around the proteins
Sex chromosomes of male & female
Female: XX
Male: XY
Chromosomal disorder
A baby born with additional or missing chromosomes
Cells can undergo _______ to form new cells
cell division
During cell division, the cell divides into two ___________
daughter cells
Living things can grow by increasing the ___________ of cells by cell division
size and number
Cells become _________ to perform a particular _________
specialized, function
list two functions of cells
movement, carrying oxygen
stem cells __________ into different types of cells
differentiate
There is a variety of _________ of cells —> closely related to its ________
shapes and sizes, function
cell differentiation
The process of cells becoming specialized
Multicellular organisms are _________
highly organized
Different types of __________ must perform their ____________ and work together at the same time
specialized cells, individual functions
Organ
a group of different tissues
a group of similar cells
tissue
