Flashcards in Biology 1b Deck (47)
True or False - animals in the desert have a large surface area to volume ratio
How has a polar bear evolved to stay warm ?
Thick layer if blubber for insulation
What is another benefit of blubber ?
Acts as an energy store when food is scarce
How has the arctic fox evolved to avoid predators ?
Light fur to blend in with snow
Why do cacti have spines rather than leaves ?
•Plants lose water vapour from the surface of the leaves. Spines have a smaller surface area so less water is lost
•They deter predators as they are sharp
give two ways wasps deter predators
•Sting contains poisons
•Yellow and black coat signifies danger
What is an extremophile ?
A microorganism that can live in very extreme environments, like volcanic vents
What do plants compete for ?
Minerals from soil
What do animals compete for ?
Mates to reproduce with
What is a living factor ?
Prey or food sources
What is a non-living factor ?
Pollution - air or water
What is a living indicator of air pollution ?
What is lichen an how does it show pollution ?
They are a moss like plant that grow on tree bark. Different species grow in different areas depending on the sulphur dioxide in the atmosphere.
What is a pollution indicator of water pollution ?
How does mayfly larvae indicate water pollution ?
They are very sensitive to the concentration of dissolved oxygen in water - left by sewage. If you see mayfly larvae the water is clean
What is an example of a non-living indicator of environmental change ? How does it measure this ?
Satellites, it can measure snow and ice cover and sea temperature
What does a pyramid of biomass show ?
The mass of living material on each tropic level of a food chain
What is a tropic level ?
It is the word given for the different stages of the food chain
What is a producer ?
The energy gradually decreases as you go up a tropic level. Why does this happen ?
Each tropic level uses some of the energy for movement ( any of the 7 life processes )
What are the perfect conditions for microorganisms ?
Moist, warm conditions
How do you make the most of a compost bin ?
Finely shredded waste
How is carbon dioxide released into the atmosphere ?
•Burning fossil fuels
•CO2 released from decay
How is carbon dioxide removed from the atmosphere ?
Some dissolves in sea
What is genetic variation ?
Your characteristic differences to others that is down to your genetic information
What is environmental variety ?
When you are different because of the environment. Like dying your hair or losing a limb
What is the nucleus ?
The part of a cell which holds your genetic material in chromosomes
What is a chromosome ?
Coils of DNA
What is DNA ?
DNA is the genetic material of humans, found in the nucleus of cells