7. In a short paragraph, relate the density of the bone to the activities and environment of
each animal, both bird and cattle.

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

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.