Which system is responsible for defending the body against harmful substances? A circulatory system B muscular system C endocrine system D immune system

Which of these is a supporting service - a service on which ecosystems depend? O A. Providing building materials O B. Raising livestock O C. Recycling nutrients O D. Providing national parks

Which element Is found in a greater abundance on earth than in meteorites

An earthworm has a heart that moves blood. What is the main function of this organ? A. To take in oxygen and remove carbon dioxide B. To take in and digest food C. To transport materials to and from body cells D. To respond to the environment

Brad is testing three solutions with litmus paper after dipping strips in the solutions he observes two papers turning blue and one turning red out of the three solutions how many are acidic

What are the two parts of an organism's scientific name?

He urine-producing functional unit within the kidney is called the:

Which phase is the the phase where Chromosomes disperse and are no longer visible. prophase metaphase anaphase telophase

True or false Weeds are specific variety of plants that strip nutrients from the soil

Explain wether nitrogen atoms will form bonds with other atoms

What are examples of radio waves