Body Systems
What system carries oxygen and nutrients through the body?
The circulatory system
What is the base of every food chain?
Producers (plants)
What organ begins the process of digestion?
The mouth
What type of selection happens naturally in the environment?
Natural Selection
What type of reproduction involves one parent?
Asexual Reproduction
What system helps you breathe in oxygen and release carbon dioxide?
The respiratory system
What type of organism eats only plants?
Herbivores
Which organ produces stomach acid to break down food?
The stomach
What type of selection happens when humans choose traits?
Artificial selection
What type of reproduction involves two parents?
Sexual reproduction
Which system sends electrical signals to control the body?
The nervous system
What type of organism eats both plants and animals?
Omnivores
Where are most nutrients absorbed?
The small intestine
Give one example of artificial selection.
Selective breeding (e.g., dog breeds, crops)
What do we call the male reproductive cells?
Sperm
What system provides structure and protects organs?
The skeletal system
What happens to energy as it moves up the food pyramid?
It decreases
What organ removes water from waste?
Large Intestine
Who developed the theory of natural selection?
Charles Darwin
What do we call the female reproductive cells?
Eggs or ova
Which two systems work together to move your body?
The muscular and skeletal systems
What do we call animals that eat other consumers?
Secondary or tertiary consumers, or apex predators
What organ produces bile to help digest fats?
The liver
In natural selection, which individuals are most likely to survive?
Those best adapted to their environment
What is one advantage of sexual reproduction?
Genetic diversity