What is the pyramid of biomass calculation?
Organisms x dry mass of one organism
What is interdependence?
The idea that one population will effect another in the wild
Why are food webs better than a food chain
They show a much wider overview
Why it difficult to count large numbers of animals?
The animals may move and be counted more than once
What does it mean to be asexual?
You reproduce without gamates
During photosynthesis what do plants absorb?
Animals die and their bodies decay. What happens to their decayed bodies?
They are used to make coal and oil, which when combusted release carbon dioxide back into the environment
What is it called when you burn coal and oil?
What is sustainable development?
Providing needs for an increasing population without harming the environment
What are the five different organism kingdoms?
Feature of fungi
They reproduce by spores
Name three features that plants have.
1. Many cells
2. They use light to make food
3. Their cells contain cellulose and chloroplasts
List two features of animals
1. They have many cells
2. They feed off other animals
Feature of protoctisa
They are single celled
They don't have a nucleus.
List the arthropod groups
Example of a myriapod
Example of a crustacean?
Example of an arachnid
Example of an insect
What Has DNA sequencing information lead to?
Changes in understanding of classification. We can see how animals have adapted
What is a species?
A group of organisms which are capable of producing fertile offspring
What do all living things need?
Energy (which ultimately comes from the sun)
What do pyramids of biomass show?
The dry mass of living material at each stage of the food chain
What percentage of the air is made of nitrogen?
What is interspecific competition?
Competition between organisms of different spieces
What is intraspecific competition?
Competition between organisms of the same species
Why is intraspecific competition more significant than interspecific competition?
The needs of both groups of organisms are identical
What s a parasitism type of relationship?
One organism benefits at the cost of its host
What is a mutualistic type of relationship?
Where both organisms gain some benefit
How are some animals adapted to be successful predators?
Teeth that grow back (shark)
Camouflaged fur or skin
Intelligent brain (humans)
How have some animals adapted to avoid being caught as prey?
They are camouflaged
They pretend to be dead (possums?)
They can climb trees
They can run fast
They live in large numbers
They are patterned (not camouflaged but they are like zebra stripes)
Which animals will be able to cope better in a changing environment?
Animals with generalist specialities as they can live in more than one environment
How do animals adapt to live in cold environments?
They have a think layer of fat/blubber under their skin (protects organs and keeps them warm)
They have thick fur
They have small ears (so less heat is transferred to the environment)
Big feet with fur on their soles (weight distribution and helps insulate feet)
What characteristics do animals that live in hot environments have?
Concentrated urine (reduces water lost)
Nostrils which close (stop sand from getting in)
Long legs to lift body off of the sand
Large feet so the animal doesn't sink into the sand
Large ears (used to fan the body)
What is Darwin's theory?
Natural selection. If a mutation benefits an animal in their environment then they are more likely to survive and reproduce. Their offspring may receive this mutation and so on.
What is Lamarck's theory?
An animal changes over its lifetime based on its experiences and will pass on these changes. The reason it was disproved is because you can not change DNA during your life
Why was Darwin's theory not well received?
It went against the teachings of the bible and was very different to that of previous theories. Darwin also had little evidence.
What are finite resources?
A source that will run out and can not be easily replaced. An example of this is oil, which is made of the fossils of animals that died millions of years ago
What is exponential growth?
The more individuals there are in a population, the faster it grows.
this is for biology b2