Biology revision Flashcards
revision
Magnification equation
m= size of image
——————
actual size of specimen
eukaryotic cell features
cells that have a membrane , cytoplasm, and DNA(in the nucleus)
prokaryotic cell features
no nucleus , DNA floating in the cytoplasm
nerve cell function
send electrical features that help us feel sensations
sperm cell function
provides 1/2 of the genetic material needed to form a zygote
muscle cell function
responsible for all movements that under voluntary control
root hair cell function
absorb water from the soil and absorb minerals
xylem function
transport water and minerals through the plant
phloem function
transports food through the plant
red blood cell function
transport oxygen and carbon dioxide throughout the body
leaf paliside cell function
absorb nutrients from sunlight
diffusion
the overall movement of particles from areas of high concentration to low concentration.
3 things that affect the rate of diffusion
concentration gradient ,temperature, surface area
osmosis
the movement of water molecules from a high water potential to a low water potential, through a semi-permeable membrane.
active transport
the movement of particles from areas of low concentration to high concentration.
mitosis
process of cell duplication,in which one cell divides into 2 genetically identical daughter cells
cell cycle stages (4)
1-increases in size
2-copies DNA
3-prepares to divide
4-cell divides
tests for lipids
SUDAN III and Ethanol
test for starch
IODINE SOLUTION
test for proteins
BIURET SOLUTION
test for sugar
BENEDICTS SOLUTION
rbc
