Cell Theory
which scientist was the first to use the word cell?
What types of cells are unspecialized?
stem cells
What organelle makes/synthesizes enzymes (proteins)
ribosomes
What organelles are found in plants but not animals?
cell wall and chloroplast
Advancements in what technology allowed scientists to develop the cell theory
microscopes
a group of similar cells come together to make what?
tissue
Organelles are like mini what?
Organs
what organelles are only found in animals?
centrioles
what is the difference between a hypothesis and a theory?
a hypothesis is a prediction for ONE experiment
a theory is an explanation of many experiments
Place these in order from least to most complex
Plant cell, leaf, chloroplast, oak tree
chloroplast --> plant cell --> leaf --> oak tree
True or False:
Organelles carry out functions similar to those of organs.
True
plant cells
how would a hypothesis become a theory?
When it is supported by consistent data from many trials.
Following fertilization, a zygote divides and soon becomes a multicelled embryo with many different cell types.
What process is being described?
Specialization
What does the cell membrane do?
controls what enters and leaves the cell
describe the shapes of plant and animal cells
plant = square/rectangle
animal = round
What are the 3 parts of cell theory?
1. all living things made of cells
2. cells are the smallest unit of life
3. all cells come from preexisting cells
True or False:
different cells have the same genes, but the same genes aren’t expressed in all cells
True
What organelle is most like the nervous system?
nucleus
True or False -
Only animal cells have a cell membrane, cytoplasm, and mitochondria. Plant cells have none of these
False