What does "A" represent in a the standard form of a double replacement reaction?

otion

cation

2.

What is the precipitate formed in the first sample reaction?

AgCl

NaCl

3.

What is the salt formed in the second sample reaction?

sodium bicarbonate

potassium sulfate

answer; ///as energy flows through an ecosystem,energy (decreases) at each

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

b a mature ovary of a plant.