What are the conditions of hydrothermal vents?
Hot with high pressure.
Tubeworms rely on bacteria and bacteria rely on tu
This is called a mutualistic relationship
Explain how carbon monoxide could affect the birth
The foetus has less oxygen for respiration or energy for growth.
State two symptoms of sickle cell disease.
Extreme Fatigue and Difficulty Breathing.
What is one advantage of being poikilothermic?
Less energy is used keeping warm.
Explain why vasodilation helps maintain body tempe
The blood vessels dilate, increased blood flow due to shunt vessels dilating, more heat is radiated (lost)
Give the name of the hormone that causes shoot tip
Give 2 ways plant hormones are used by commercial
Ethene is used by supermarkets to ripen fruit.
Rooting powder to make plants grow quicker
Explain how photo+geo tropism affect the developme
Phototropism causes elongation of tip, bends towards light, maximises light for photosynthesis, produces sugar/starch energy growth.
Geotropism, roots grow downwards into soil, plant is well grounded, maximises water/nutrient, minerals intake.
explain how bacteria in the soil can be essential
decomposing bacteria break down dead animals/plants...creates ammonia
nitrifying bacteria converts ammonia/nitrites to nitrates...plants use nitrates to make proteins/amino acids
denitrifying bacteria converts nitrates to nitrogen...fertlisers being added
name one involuntary reaction