Second-Stage Labor Begins When ________

question 102

Multiple Choice

Second-stage labor begins when ________.

• A) the placenta is discharged
• B) the baby begins to breathe on its own
• C) the mucous plug is expelled from the cervix
• D) the baby's head moves into the birth canal

Comprehend the ecological importance of transitional zones (ecotones) between ecosystems.

Describe the role and sources of nutrients in aquatic ecosystems, including the concept of marine snow.

Identify and characterize the different categories of aquatic organisms (nekton, benthos, etc.).

Recognize factors that influence the distribution of organisms in aquatic biomes.