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What is the largest element of the intraseasonal variability in the tropical atmosphere?

Intertropical Convergence Zone

Madden–Julian oscillation

Hadley cell

El Niño–Southern Oscillation

The Madden–Julian oscillation is a large-scale coupling between atmospheric circulation and tropical deep convection. Unlike a standing pattern like the El Niño Southern Oscillation, the Madden–Julian oscillation is a traveling pattern that propagates eastward, through the atmosphere above the warm parts of the Indian and Pacific oceans. This overall circulation pattern manifests itself most clearly as anomalous rainfall.

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How do baby birds get oxygen inside their eggs?

They have a large oxygen supply from the start

Oxygen is created during protein reduction

Oxygen comes in through pores in the shell

They don't need oxygen at all

Which dogs are known to eat fish?

Irish Water Spaniel

Portuguese Water Dog

Okavango river is famous for its biologically rich delta. What is the river's outlet?

It doesn't have an outlet to the sea

The Battle of Leyte Gulf was the largest naval battle of World War II. What country does it belong to?

the Solomon Islands

the Philippines