biology

biology

what all cells have in commmon
1. the cells that make up the bodies of animals, plants, or even the single cell of paramecium have an estraordinary variety of different shapes and sizes, but they all have a similar structure
  1. cytoplasm. Sll of the contents of the cell, other than the nucleus. it looks like jelly and contains the cell's organelles which carry out various different function
  2. cell membrane or plasma membrane. this is a fine layer that surrounds the cell. it lets certain substances into, and our of, the cell but stops others
  3. nucleus. this is the largest and most visible structure inside the cell. it contains DNA, the genetic material. animal and plant cells have a nucleus tht is separated from the cytoplasm by a membrane. we call these ekaryotic cells
  4. in bacteria, the DNA and organelles are not enclosed in a membrane. these cells are much smaller and are called prokaryotic cells
  5. eukaryotes
  6. prokaryotes
unicellular
1. paramecium and amoeba, found in puddles and ponds, are unicellular organisms, with the following characteristcs
2. they are nearly always microscopic. this means taht we can only see them if they are magnified under a microscope
3. their single cell is all it needs ro keep it alive. this means that just one cell can carry out all of the functions that are characteristic of living things: movement, reproduction, interaction,growth, etc.....
multicellular
1. most plants and animals are made of large numbers of cells. They are multicelluclar organisms and these are their characteristics
2. they are nearly always macroscopic and can e seen with the naked eye. they grow by multiplying their number of cells and can reach enormous sizes, though some are very small
3. their many cells share the work of keeping the organism alive and each cell is specialised for one particular function

Next up

Description

Resource summary

Media attachments

Similar

	Created by leyre chao de carlos over 6 years ago