What unusual event occurs during el niño?
o
a. there is unusually low pressure in the western tropical pacific.
b. the trade winds blow harder to the west.
c. the pressure gradient decreases.
o
d. warm water flows south along the east coast of south america.

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)

Sydney drew a flow chart to illustrate the nitrogen cycle.which labels best complete the flow chart? x: producers undergo photosynthesis.y: nitrogen compounds are released into the air.x: nitrogen compounds are released into the air.y: producers undergo photosynthesis.x: free nitrogen is in the atmosphere.y: producers absorb nitrogen compounds through their roots.x: producers absorb nitrogen compounds through their roots.y: free nitrogen is in the atmosphere.

Drag each label to the correct location on the image. g organisms adopt different strategies and structures to make sure their offspring it uses. herds young into center of group produces many offspring at once to protect against high predation risk protects offspring until environmental conditions are ideal for growth coo b 13 1994 7 odos si . an . i