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Questions in biology

[Open]What is the size range of a eukaryotic cell?

[Open]A testable explanation that can be supported or refuted is called a/an A. experiment B. reaction C. hypothesis D. variability

[Open]Is there DNA in your food? How do you know?

[Open]In humans, the allele for red hair, \( b \), is recessive to the allele for brown hair, \( B \). A man and his wife both have brown hair. They have five children, three of whom have red hair, while two have brown hair. Explain how this may happen using a genetic diagram to support your answer.

[Open]In the mantle, heat is transferred as soft rock flows slowly in cycles known as convection currents.

[Open]What role do producers play in establishing Earth as a living planet?

[Open]What are the smallest blood vessels in a frog?

[Open]What would life be like without plate tectonics?

[Open]What role do bacteria and other tiny organisms play in ensuring that nutrients are always available in ecosystems?

[Open]The theory of a land bridge between South America and Africa as an explanation for similar fossils on the two continents is not supported today because _____.