The gas most required for animal life to survive on Earth is

nitrogen

carbon dioxide

oxygen

water vapor

What are bacteria using for nutrients in nutrient agar?

Explain what liquid diets fasting and diet pills have in common

Which correctly relates a function with a type of tissue? contraction of the heart : skeletal muscle tissue constriction of blood vessels : voluntary muscle tissue insulation of the body : nervous tissue stomach acid secretion in the digestive tract

What is aerobic metabolism?

How do materials cycle through the ecosystem during the nitrogen and carbon cycle?

On the galapagos islands, darwin discovered birds with differently shaped beaks. what might this tell you about the eating habits of the birds on different islands

Which of the following best explains why marine debris is not caused solely by countries bordering the ocean? None of the above Debris is carried to the ocean by winds, rivers, and storms. Marine debris mostly originates from oceangoing ships.

Classify the descriptions as being representative of either the somatic nervous system or the autonomic nervous system

How are pedigrees identified?

Which statement describes renewable resources? A. Fossil fuels are a type of renewable resource B. Renewable resources our artificial C. Renewable resources replenished quickly D. Cheap energy often comes from renewable resources