Flashcards in Unit 2 Deck (41)
Terrain refers to how the land lies
What are the four main hazards and risks associated with field work?
How can a field biologist prepare for the risk of changing weather conditions?
Check the forecast
Wear appropriate clothing, footwear
What is a risk assessment?
Document that identifies potential hazards, assesses the likelihood of them occurring and describes how to minimise their occurrence
What should be considered before sampling is carried out?
- How to minimise impact on wild species
- Legalisation which protects rare animals
What sampling technique would you use to sample along an area where abiotic factors are changing?
Describe a point count
Sampling technique used for sampling bird populations over a given area and period of time
Describe a transect and the two things you can sample with them
Line along which different samples can be taken
Where terrain or abiotic factors are changing
Used to sample small slow moving animals or abiotic factors
What is a benefit of using remote direction for elusive species?
Can use camera traps so they can observe the animal without the observer being present
Describe Scat sampling
Collecting animal drops providing information about the animals diet and abundance
What are the three types of sampling?
Describe the difference between random and stratified sampling
Random - individuals selected from larger populations chosen at chance
Stratified - large population split into smaller populations then individuals selected from sub populations
Explain what Systematic Sampling is?
Sampling that is taken at regular intervals, eg every two minutes along the transect
State the 8 Taxonomic Levels
Why is it important for a biologist to be familiar with taxonomic groupings?
Allow predictions to be made between unknown organisms and model organisms
What are the five divisions between the plant kingdom?
What plant type is this description of?
- No seeds
- No Vascular System
What method of reproduction do ferns use?
Do Liverworts produce flowers?
No, they are flowerless
a) Produce flowers?
b) Produce spores for reproduction?
b) No, they reproduce by seed production
State the five animal phyla you are required to know for Advanced Biology
Give an example of an organism in the chordata phyla
Sea squirts and Vertebrates
Example: Birds, Mammals, Reptiles, Amphibians, Fish
What animal phyla would wasps, a joint legged invertebrate with a segmented body and paired appendages be in?
What organisms fall in the Platyhelminthes phyla?
Organisms who are bilaterally symmetrical and don't have a body cavity or any internal organs
Example: Flat worms
What could you use to identify organisms which have been sampled?
Analysis of DNA
What is divergent evolution?
Accumulation of differences between previously closely related groups of species, leading to the formation of a new species
What sampling technique would you use to estimate the size of a population of animals?
Mark and Recapture
Give three examples of methods of marking an individual
What three things must happen for estimates of a population to be more accurate?
- Equal chance of capturing unmarked and marked individuals
- No immigration or emigration from the areas
- Marked individuals are completely mixed into populations