What is the difference between an observation and a inference

Describe two of the possible explanations for the contamination of the city's water system?

What is the total number of B alleles in a population

Which of the following characteristics is most likely explains why insects are so successful at dispersing to distant environments? A) Protostome B) Wings C) Jointed appendages D) Chewing mandibles E) Exoskeleton

What type of resource is Sunlight? A. Recyclable only B. Renewable only C. Non Renewable only D. Recyclable and Renewable

What cycles on earth does Solar radiation fuel?

Egg and sperm are a type of these?

Is coral a plant or an animal?

What prevents blood movement from left ventricle to left atrium

What happens in an aphotic zone of a body of water

Which of the following items would be an ecosystem within the ocean ecosystem? a. marshes b. coral reefs c. rivers d. ponds