Nature and Variety of Life Flashcards
movement
The ability to change location or position
Respiration
chemical reaction that takes place in all of our cells
sensitivity
the ability to detect and respond to changes in the environment
homeostasis
the ability to maintain a constant internal environment
growth
increase in mass or volume of an organism
reproduction
generation of offspring
excretion
removal of toxic waste from the body
nutrition
supplies organism with food it needs for respiration, growth, repair and reproduction
nucleus
1) contains chromosomes which carry genetic material
2) controls activity of cell
cytoplasm
where chemical reactions take place
cell surface membrane
controls what enters/leaves the cell - selectively permeable
chloroplast
absorb light energy used to make glucose in photosynthesis
vacuole
membrane filled with cell sap, stores dissolved sugars, mineral ions and other solutes
cell wall
gives structure and rigidity to plant cell, helps keep shape, made of cellulose
RBC function
transports oxygen from lungs to tissues where aerobic respiration occurs
RBC adaptation
cytoplasm filled with pigment haemoglobin, which helps carry oxygen
neurone function
conducts electrical nerve impulses
Neurone adaptation
Long and fatty myelin sheath for insulation
Root hair cell function
absorbs minerals and water needed for photosynthesis
Root hair cell adaptation
large surface area helps increase rate of water absorption
bacteria
unicellular, no obvious nucleus
Protoctists
unicellular, has a nucleus
fungi
multicellular, no chlorophyll, has a cell wall
animals
multicellular, has a nucleus, no cell wall
plants
multicellular, has a nucleus, has a cell wall, chlorophyll
Viruses
no nucleus, parasitic
