BIO 1Br June 2019 Flashcards
Why grass in food web contains energy
- Light energy turns into chemical energy
-photosynthesis - Carbohydrate store as Starch
Why percentage of energy in rabbits is not available for owl
- excretion
- Respiration
- Decomposition
- ## Not absorbed
Why chewed mice is faster digested
- Chewed mice has larger surface area to volume ratio
- Therefore easily digest
- Whole mice has smaller
- surface to volume ratio
Discuss two abiotic variables that the scientists control while seeds are germinating
- conctentration of wate
- intensity of light
-Temperature affecting enzyme - Oxygen for respiration
- pH affects enzyme
Role of mineral ions in plants growth
- mineral ions contains amino acids
- to create proteins
- DNA
The faeces of genetically modified (GM) farm animals contain less phosphate
Some people catch fish from rivers near farm land.
Discuss why these people might support the genetic modification of farm animals
- less phospate means less eutrophication
- More light for photosynthesis for plants in river
- less decomposed
- more oxygen
- Plants and fish will respire
- Fish survive
Role of enzyme in genetic modification
- Restriction enzyme to cut DNA and plasmid
- Ligase enzyme to join DNA and Plasmid
Explain how the fat deposit would affect the type of respiration in the heart muscle.
- Less O2 to body
- Becomes anaerobic
Factors causing CHD
-Unhealthy diet
- Unhealthy lifestyle/lack of exercise
- Smoking
- Alcohol
- Obesity
- Genetics
Explain these changes in diameter and blood flow when moving from a cold environment
to a warm environment.
Cold has smaller diameter and less blood flow
- (cold) Less blood to skin surface
- To prevent more heat loss
- (warm) More blood to
surface / vasodilation - ## To allow more heat loss
Bacterium used to make yoghurt
Lactobascillus
What acid produce during production of yoghurt
Lactic Acid
Suggest two reasons why the mean height for males is greater than the mean height
for females.
- genes
- Diet
- Hormone
- respiration
- less bone mass
Suggest how a doctor could diagnose whether a new patient has piebaldism (genetic) or vitiligo
- check family history
- DNA test
- Born with condition or not
State how the teacher could demonstrate breathing in using bell jar model of the thorax
Pull rubber sheet down
