Chapter 1- pqs

Question 1

How can a student obtain measurements AND process a reliable mean [5]

Answer 1

1.Study area into grid
2.Random number generator
3. Use same method of measurement {be specific to question e.g:from ground to highest leaf}
4.Repeat large number of times
5.Find SUM of heights+divide by number of PLANTS
6. calc running mean

Question 2

In recent years, our knowledge of prokaryotic biodiversity in the soil has increased
Suggest Why [2]

Answer 2

.DNA sequencing now used
.Now can analyse more prokaryotic species
.rather than just recording measureable/observable characteristics

Question 3

Describe and explain how results with the highest species richness but the lowest value of index of diversity can occur [2]

Answer 3

.Many different species
.However, a few species were present in very large numbers

Question 4

Describe the structure and function of the nucleus [4]

Answer 4

Structure:
.Nuclear envelope AND pores
.Chromosones
Nucleolus

Functions:
.Stores genetic info for polypeptide production
.DNA production occurs
.Production of mRNA
.Production of tRNA/ ribosomes

Question 5

Suggest one reason the scientists used biomass instead of the number of individuals of each plant species when collecting data to measure diversity [1]

Answer 5

Individual organisms could not be identified/ too small to count individuals

Question 6

Define genome and proteome

Answer 6

Genome- all the genetic material in a cell
Proteome-range of proteins CODED FOR by the genome

Question 7

Describe how organisms are grouped in a phylogenetic classification system [2]

Answer 7

.Heirarchy (of groups) with no overlaps
. Grouped accordingly to evolutionary origin/relationships