____________________ are random changes in the structure or number of DNA molecules in a cell
Fill in the blanks with correct word
Mutations
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Some planktonic marine organisms produce a tiny droplet of oil to ________ density and ________ buoyancy
A) decrease; decrease B) decrease; increase C) increase; increase D) increases; decrease E) There is no relationship between density and buoyancy.
Large river systems that have multiple large channels across a vast floodplain are termed
A) anabranching rivers. B) braided streams. C) meandering streams. D) steep-walled channels.
Guano is significant because
A) it is a major source of phosphorus. B) its presence is considered a sign of an imminent volcanic eruption. C) it is a major part of the global sulfur cycle. D) it is a sign of a pioneer community.
What two countries in South Asia have nuclear weapons?
A) India and Pakistan B) Bangladesh and Sri Lanka C) Pakistan and Bangladesh D) Bhutan and India E) Sri Lanka and Bhutan