answers Flashcards
what does bacteria have in it
chitin
question 3 answer
plant
what is needed for diffusion to happen
concentration gradient
why is it important for stem cells to differentiate in cells?
Why is it important for stem cells to differentiate?
So our bodies can grow and develop properly.
To replace damaged or dead cells (e.g., healing cuts, making new blood cells).
So different cells can do their jobs
Basically, without differentiation, our bodies wouldn’t work properly.
Why is it hard from scientists to choose between using embryonic stem cells and bone marrow stem cells
Embryonic Stem Cells
✅ Can turn into any type of cell (very useful for medicine).
❌ Some people think using them is unethical because they come from embryos.
Bone Marrow Stem Cells
✅ Already used in treatments (e.g., for leukemia).
✅ Less ethical issues since they come from adults.
❌ Can only turn into certain types of cells (not as flexible as embryonic stem cells).
equipment needed for osmosis experiment
There’s a beaker of water, ruler, funnel, stopwatch, selectively permeable membrane and a sugar solution
how do you test for fats in a nut
you need to do the ethanol test
first you put some ethanol in the test tube with the food sample in it. allow some time for the nut to dissolve. strain the ethanol solution into another test tube. add the ethanol to water which has the same volume. if fat is present it should turn cloudy. if fat is not present it should stay colourless.
Benedicts soloution test result
negative: light blue
positive: brick red
what is fibre used for
Fiber helps with digestion, prevents constipation, lowers cholesterol, controls blood sugar, and supports gut health
what is respiration
organisms release energy from their food by a process called respiration
control
they can control their internal conditions. such as body temp
why does fruit juice cause tooth decay
Fruit juice is high in sugars and acids, which can wear down tooth enamel and promote bacteria growth in the mouth, leading to tooth decay. Drinking it frequently or sipping it over time increases the risk.
give another health risk related to drinking too much high concentrated sugary drinks
Drinking too many sugary drinks can also increase the risk of obesity, as they are high in calories but don’t make you feel full, leading to overeating.
