Science Flashcards
What part of the cell controls the cell and stores genetic information
Nucleus
What part of the cell controls what goes in and out the cell?
Cell membrane
What do we call part of the cell that releases energy from glucose during respiration
Mitochondria
What do eukaryotic cells (plant, animals, fungi and protists) have that prokaryotic cells do not?
Nucleus
What three component to plant cells have that animal cells do not?
Vacuole (for storage)
Cell wall (support)
Chloroplast (photosynthesis)
What is the formula for magnification
Magnification= image size ÷ real size
How many ɥ (micrometers) are there in 1mm
1mm= 1000ɥm
What is the adaptation of a sperm cell
Tail to swim. Lots of mitochondria to release energy. Contains male DNA, streamlined shape
What word means- when a cell reproduces itself by splitting into forms of identical cells?
Mitosis
What do we call a cell that is undifferentiated and can become any kind of cell?
Stem cells (embryonic)- animals
Meristem- Plants
What is step 1 of a cell cycle?
DNA and organelles, like mitochondria are replicated (copied)
What is step 2 of Cell Cycle?
Chromosomes line up in the centre of the cell and are pulled up by fibres.
What is step 3 of Cell Cycle
Cytoplasm and Cell membrane divide.
Two identical cells forms.
Diffusion is when particles spread form a region of high concentration to low concentration. What can make it faster?
Higher concentration gradient (wind)
Higher temperature
Bigger surface area
What is osmosis
(How water goes into a root hair cell)
The movement of of water molecules across a semi permeable membrane from high concentration of water to a low
