Energy Flow
This organism is found at the bottom of an energy pyramid because it makes its own food.
What is a producer?
This body system transports oxygen and nutrients throughout the body.
What is the circulatory system?
This type of reproduction involves one parent and usually produces identical offspring.
What is asexual reproduction?
This type of selection happens when humans choose desirable traits in organisms.
What is artificial selection?
This is the smallest unit of life.
What is a cell?
Energy moves through an ecosystem from the Sun to producers and then to these organisms.
What are consumers?
This body system breaks down food into nutrients the body can use.
What is the digestive system?
This type of reproduction usually creates greater genetic diversity.
What is sexual reproduction?
Dogs bred by humans for certain traits are an example of this type of selection.
What is artificial selection?
A group of similar cells working together forms this.
What is tissue?
As energy moves up an energy pyramid, the amount of available energy does this.
What is decreases?
The skeletal and muscular systems work together mainly to do this.
What is help the body move/support the body?
A hydra growing a new organism from its body is an example of this type of reproduction.
What is budding?
This type of selection occurs naturally when organisms best adapted survive and reproduce.
What is natural selection?
A structure made of different tissues working together is called this.
What is an organ?
In this food chain, grass → rabbit → snake → hawk, this organism receives the least amount of energy.
What is the hawk?
This body system protects the body from disease-causing organisms.
What is the immune system?
This process occurs when male and female reproductive cells join together.
What is fertilization?
Over many generations, giraffes with longer necks surviving more often is an example of this.
What is natural selection?
This level of organization includes organs working together to perform a major function.
What is an organ system?
This process returns nutrients back into the ecosystem after organisms die.
What is decomposition?
The nervous system communicates with the body using these.
What are nerve signals/electrical impulses?
Sexual reproduction benefits populations because it increases this.
What is genetic variation/diversity
Natural selection changes the occurrence of these within a population over time.
What are traits?
Put these in order from smallest to largest: organ, tissue, cell, organ system.
What is cell → tissue → organ → organ system?