B2, Biology, May 2012 past paper 0.0 / 5 ? BiologyAllGCSEAQA Created by: emmajane_Created on: 10-03-14 18:07 Name 3 control variables for athelets Age, gender and intensity of exercise 1 of 15 Name two control factors that are hard to measure for atheletes metabolic rate and starting concentration of oxygen 2 of 15 CELLS- What is the function of a ribsome? It makes protein 3 of 15 CELLS- How is a plant cell different to a bacterial cell? plant cell has a nucleus or plant cell is much larger 4 of 15 Describe how you would use a 1/2 metre x 1/2 metre quadrat frame and a 30-metre tape measure to obtain data Placing of quadrats, use tape measure to produce transects, at random, carry out several times (>3) and score presence of each plant species 5 of 15 What is mitosis? The splitting of any non- gamete cells 6 of 15 GENETICS- What is meiosis? The splitting of gamete cells 7 of 15 GENETICS- What happens to the genetic material before a cell divides? It replicates 8 of 15 GENETICS- A gardener wanted to produce a new variety of onion. Explain why sexual reproduction could produce a new variety of onion. fertilisation ooccurs, leading to mixing of genes, gametes produced my meiosis 9 of 15 PHOTOSYNTHESES- What is the chemical equation for photosyntheses? carbon dioxide + water --light energy--> glucose 10 of 15 PHOTOSYNTHESES- Why do leafs take in oxygen in the dark? rise then fall in temperature, max. production at 40 degrees C 11 of 15 FOSSILS- How do fossils provide evidence that species alive today have evolved from simpler organisms? fossil is remains of an organism that lived a long time ago, fossils show changes over time, fossils have similar features to present-day species 12 of 15 SPECIES- Explain why species develop differently isolation by geographical barrier, variation in different isolations, so differences lead to inability to interbreed. 13 of 15 What is an allele? Alternative forms of the same gene 14 of 15 What does recessive mean? Only expressed if two copies inhereted 15 of 15
Comments
No comments have yet been made