A scientist hypothesizes the temperature at which an alligator's egg is incubated will determine whether the alligator will be male or female. The independent variable is... the temperature
the temperature

the male alligators
the male alligators

the gender of the alligator
the gender of the alligator

the incubator
the incubator

science-ocean floors and habitats study guide by volleyballqueen3817 a major advance in ocean-floor mapping. list four sections of the ocean floor. algae that use sunlight to produce their own food through photosynthesis. all of the feeding relationships that exist in a habitat. drying out, predators, find food.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.