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Questions in biology

[Terjawab] 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.

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

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

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

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

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

[Terjawab] 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 _____.

[Terjawab] Two heterozygous white (brown fur is recessive) rabbits are crossed.

[Terjawab] Contrast common attitudes toward bogs in the past and the present.

[Terjawab] Which of the following should be specified in an emergency management plan? A. Detailed instructions for administering CPR B. Phone numbers of the children's parents C. Procedures for when children are napping D. First-aid qualifications of the teachers