Biology Revision Flashcards
I will add more cards later
What does MRS GREN stand for?
Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition
What does MRS GREN mean?
Movement: Living things moving themselves using their own energy. Respiration: The release of energy for life processes. Creates waste products. Sensitivity: Living organisms reacting to their environment. Growth: Living organisms growing throughout their lives. Reproduction: All living organisms reproduce to ensure the survival of the species. Excretion: Excretion is the removal of wastes the are produced by the organism. Nutrition: Making energy by taking in food. Plants can make their own food by photosynthesis. Animals eat other organisms to obtain energy.
What are the parts in an animal cell?
Nucleus, mitochondria, cytoplasm, cell membrane.
What are the parts in a plant cell?
Nucleus, mitochondria, cytoplasm, cell membrane, cell wall, chloroplast, large vacuole
What are the parts of the plant cell that animal cells don’t have?
Large vacuole (or just vacuole), cell wall, chloroplast.
What is the function of the nucleus?
Holds the cell’s DNA and controls the functions of the cell
What is the function of the mitochondria?
Generates the energy needed to power the cell.
What is the function of the cytoplasm?
Jelly like substance that fills the cell and where chemical reactions occur
What is the function of the cell membrane?
Controls which substances enter and exit the cell.
What is the function of the cell wall?
Provide rigid support to the cell.
What is the function of the chloroplast?
Site of photosynthesis in the cell.
What is the function of the large vacuole?
Stores food and water inside the cell and fills the inside of the cell to help keep it firm
Why are producers important to food webs?
Producers make their own food (in the form of glucose) and therefore create the baseline of a food web. Other animals survive by eating producers and gain the energy the producers made themselves. Consumers cannot make their own food.
Why are decomposers important to food webs?
Decomposers break down and return nutrients to the soil for the food chain. This ensures the biodiversity of the natural environment and reduce waste.
What is a producer?
Organisms that manufactures food by utilising energy from the sun.
What is a primary consumer?
Organisms that eat producers, herbivores.
What is a secondary consumer?
Organisms that eat primary consumers, carnivores.
What is a tertiary consumer?
Organisms that eat secondary consumers, carnivores that eat carnivores.
What is a consumer?
An organism that obtains energy by eating other organisms.
Explain what a structural adaptation is.
Physical part of an organism’s body that enables it to survive in its habitat (on the outside)
Explain what a behavioural adaptation is.
Behaviour(something an organism does) of an organism that enables it to survive in a particular habitat
Explain what a physiological adaptation is.
Adaptations such as a change in the organism’s biochemistry or internal mechanisms to deal with an environmental problem. (on the inside)
Explain why hawks have excellent eyesight
This enables hawks to see their prey better. Seeing prey better means they can catch more food and so survive better
What is a carnivore?
An animal that feeds on other animals.