BIO 1Br June 2020 Flashcards
(25 cards)
What vacuole do
Contains cell saps
What cytoplasm do
Where chemicals reactions occur such as protein synthesis and respiration
Why PALISADE MESOPHYLL contains chloroplast
absorb light for photosynthesis
Why PALISADE MESOPHYLL has large surface area
Absorb most light
why palisade mesophyll has large vacuole
To store water
Function of insulin
control blood sugar level
(FERMENTER) What is it cleaned with
steam
(FERMENTER) use of paddles
distributes contents
(FERMENTER) Name of gas bubbled into it
Oxygen
(FERMENTER) function of cooling jacket
To control temperature
What happen to diaphragm and external intercostal muscles
when breathe in
both contract
Why theres more blood flow at legs when running
-There is more blood to muscles
- blood supply oxygen
- for respiration
-muscle contraction
Why we continue to breathes faster and deeper after we stop running
-Supply more oxygen
-Repay oxygen debt
- Remove lactic acid
Example of term decrbing trophic level
producer,consumer,etc..
Suggest why there were more mice in year 4 than in the other years.
- warmer weather
- Less disease
- Conc of food increase
- Owl feeds on other animals
Suggest why the number of owls was fairly constant each year
-Feed on other prey
- insufficient food
- no predators
- owls produce little offspring
Suggest a method you would use to estimate the number of mice in the woodland.
- place quadrat at random
- count of mice in quadrat
- calculate average
- repeat
Explain how some molecules in blood allow active transport to occur in cells of fetus
- Oxygen is used or respiration
- produces glucose and energy
) Explain how one type of molecule from the mother helps to protect the fetus
from infection.
- Mother gives antibodies
- Antibodies binds to antigens
- to kill bacteria
The student’s method LACKS DETAILS.
Rewrite the method so that the student could make a valid conclusion about the
effect of temperature on amylase.
- same Conc of amylase
- same mass of bread
- range of temp
- same Conc of benedict
- repeat
) The student predicted that the rate of digestion of starch would keep increasing
as temperature increased.
Comment on this prediction.
- increased in KE
- More collisions
- until optimum temp
- rate decrease at high temp
- because enzyme denature
Suggest why using e‑cigarettes may be thought to be less harmful than
smoking normal cigarettes
- less tar
- less risk of cancer
- less CO
- less Rick of heart disease
Suggest why many doctors are concerned about promoting the use of
e‑cigarettes to young people.
- non smokers may start using e cig
- As addictive as normal cig due to nicotine
- Nicotine increase risk of blood clot
- e cig can damage lungs
Why fertilisers may decrease O2 Conc in a river
- Fertilisers washed into rivers
- Eutrophication
- Algae decomposed and bacteria reproduce (a lot)
- Bacteria need oxygen to respire
OR
- Dead algae
- block sunlight from entering
- Plants cannot absorb sunlight to photosynthesise
- Less photosynthesis = less O2
