bio final part c

Question 1

advantage of random sampling compared to systematic sampling

Answer 1

1. best use for smaller data sets
2. produce more representative results
3. unbiased method

Question 2

identify 1 random sampling technique in studying species richness

Answer 2

1. frame quadrats
   - use a square frame to mark off an area
   - count the abundance of each species in each frame to measure species abundance
   -sample taken randomly to avoid bias
2. mark, release and recapture
   - use trap to trap animal
   - animal caught as many as possible for the first time and marked and recorded n1
   - animal released into their habitat and mixed randomly with their population
   - another sampling take place and both the marked and unmarked animal caught recorded n2

Question 3

how to avoid biases during sampling

Answer 3

1. use random sampling method
   - ensure each member of population has equal chance of being selected
   - minimize selection bias
2. larger sample size
   - provide more reliable estimate
   - reduce sampling bias

Question 4

procedure to study species richness

Answer 4

1. define study area
2. select sampling site
3. select appropriate sampling method
4. data collection
5. data analysis

Question 5

suggest sampling method to study reptile and insects

Answer 5

belt transect
1. make 2 parallel line on ground between 2 point within the sampled area
2. quadrats placed at interval
3. species within/ touching the quadrat are recorded to determine the abundance and distribution of reptile/insect

Question 6

independent variable

Answer 6

manipulated variable

Question 7

simpson diversity index

Answer 7

1- sum of square (total num of organism of a species/ total num of organism of all species)

Question 8

null hypothesis and alternative hypothesis

Answer 8

null: made statement(try to disprove)
alternative: hypothesis we try to prove