Studied by 3 people
Carbon dioxide
________ diffuses into the air spaces within the leaf, then it diffuses into the cells where photosynthesis happens.
Vacuole
________- Contains cell sap, a weak solution of sugar and salts.
Meristem tissue
________ in plants can differentiate into any type of plant cell throughout the life of the plant.
Ribosomes
________- Where proteins are made in the cell /the site of protein synthesis.
Active transport
________ allows mineral ions to be absorbed into plant root hairs from very dilute solutions in the soil.
Stains
________ are used to highlight objects in a cell by adding colour to them.
genetic material
The ________ is not enclosed in a nucleus.
Cytoplasm
________- Gel like substance where most of the chemical reactions happen.
Chloroplasts
________- Site of photosynthesis which makes food for the plant.
Mitochondria
________- These are where most of the reactions for aerobic respirations take place.
Plant
________ and animal cells (eukaryotic cells) have a cell membrane, cytoplasm and genetic material enclosed in a nucleus.
Oxygen
________ (produced in photosynthesis) and water vapour also diffuse out through the stomata.
mitosis
In ________ one set of chromosomes is pulled to each end of the cell and the nucleus divides.
Nucleus
________- Contains genetic material that controls the activities of the cell.
green substance
They contain a(n) ________ called chlorophyll which absorbs the light needed for photosynthesis.
DNA
The ________ replicates to form two copies of each chromosome.
Cell
________ membrane- Holds the ________ together and controls what goes in and out.
Differentiation
________ is the process by which a cell changes to become specialised for its job.
embryo
In therapeutic cloning a(n) ________ is produced with the same genes as the patient.
Substances
________ may move into and out of cells across the cell membranes by diffusion.
electron microscope
The ________ has increased the understanding of sub cellular structures because they have a higher resolution.
number of sub cellular structures
Before a cell can divide it needs to grow and increase the ________ such as ribosomes and mitochondria.
Phloem
________ and xylem cells from ________ and xylem tubes, which transport substances such as food and water around plants.
temperature
The ________: The higher it is, the faster the diffusion rate because the particles have more energy so move around faster.
slide
A(n) ________ is a strip of clear glass or plastic onto which the specimen is mounted.
Osmosis
________ is the diffusion of water from a dilute solution to a concentrated solution through a partially permeable membrane.
Microscopy techniques
________ have developed over time as technology and knowledge have improved.
Stem cells
________ from meristems in plants can be used to produce clones of plants quickly and economically.
Crop plants
________ with special features such as disease resistance can be cloned to produce large numbers of identical plants for farmers.
surface area
The ________ of the membrane: The bigger it is, the faster the diffusion rate because more particles can pass through at once.
cell membranes
Water may move across ________ by osmosis.
dependent variable
The ________ is the chip mass and the independent variable is the concentration of the sugar solution.
nucleus of a cell
The ________ contains chromosomes made of DNA molecules.
alveoli
The ________ are specialised to maximise the diffusion of oxygen and carbon dioxide.
multicellular organisms
In ________, surfaces and organ systems are specialised for exchanging materials.
Sugar molecules
________ are used for cell respiration.
Diffusion
________ is the spreading out of the particles of any substance in solution, or particles of a gas, resulting in a net movement from an area of high concentration to an area of lower concentration.
Respiration transfers energy
________ that the cell needs to work.
gill filaments
The ________ are covered in lots of tiny structures called lamellae which increase the surface area even more.
Iodine solution
________ is a stain.
single DNA loop
It is a(n) ________ and there may be one or more small rings of DNA called plasmids.
function of a sperm
The ________ is to get the male DNA to the female DNA.
Light microscopes
________ use light and lenses to form an image of a specimen and magnify it.
cell division
In mature animals, ________ is mainly restricted to repair and replacement.
Most animal cells have
nucleus, cytoplasm, cell membrane, mitochondria, ribosomes
In addition to the parts found in animal cells, plant cells often have
chloroplasts, a permanent vacuole filled with cell sap
Nucleus
Contains genetic material that controls the activities of the cell
Cytoplasm
Gel like substance where most of the chemical reactions happen
Cell membrane
Holds the cell together and controls what goes in and out
Mitochondria
These are where most of the reactions for aerobic respirations take place
Ribosomes
Where proteins are made in the cell / the site of protein synthesis
Cell wall
Made of cellulose
Vacuole
Contains cell sap, a weak solution of sugar and salts
Chloroplasts
Site of photosynthesis which makes food for the plant
Plasmids
Small rings of DNA
The difference in concentrations (concentration gradient)
The bigger it is, the faster the diffusion rate
The temperature
The higher it is, the faster the diffusion rate because the particles have more energy so move around faster
The surface area of the membrane
The bigger it is, the faster the diffusion rate because more particles can pass through at once
Percentage change = final value
original value x 100/original value
Note 
Flashcard (65)