B2, Biology, May 2012 past paper

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  • 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
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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

Other cards in this set

Card 2

Front

Name two control factors that are hard to measure for atheletes

Back

metabolic rate and starting concentration of oxygen

Card 3

Front

CELLS- What is the function of a ribsome?

Back

Preview of the front of card 3

Card 4

Front

CELLS- How is a plant cell different to a bacterial cell?

Back

Preview of the front of card 4

Card 5

Front

Describe how you would use a 1/2 metre x 1/2 metre quadrat frame and a 30-metre tape measure to obtain data

Back

Preview of the front of card 5
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