Biology B1 Influences On Life edexcel new specification 2011 2.0 / 5 based on 6 ratings ? BiologyEnergy flow through ecosystemsGCSEAll boards Created by: sophie kerrCreated on: 02-11-11 21:06 What are the conditions of hydrothermal vents? Hot with high pressure. 1 of 11 Tubeworms rely on bacteria and bacteria rely on tu This is called a mutualistic relationship 2 of 11 Explain how carbon monoxide could affect the birth The foetus has less oxygen for respiration or energy for growth. 3 of 11 State two symptoms of sickle cell disease. Extreme Fatigue and Difficulty Breathing. 4 of 11 What is one advantage of being poikilothermic? Less energy is used keeping warm. 5 of 11 Explain why vasodilation helps maintain body tempe The blood vessels dilate, increased blood flow due to shunt vessels dilating, more heat is radiated (lost) 6 of 11 Give the name of the hormone that causes shoot tip Auxin 7 of 11 Give 2 ways plant hormones are used by commercial Ethene is used by supermarkets to ripen fruit. Rooting powder to make plants grow quicker 8 of 11 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. 9 of 11 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 10 of 11 name one involuntary reaction blinking 11 of 11
Comments
Report
Report
Report