Bone cells called "Osteoclasts" break down bone by secreting hydrochloric acid and enzymes that dissolve the matrix.
Osteoclasts is "a large multinucleate bone cell that absorbs bone tissue during growth and healing"
The earth is made up of fossils that have been discovered around the world
Answer:
x: Niche
y: habitat
Explanation:
x: because a niche is an action of an animal and one of the bullet points state " describes how a organism interacts with its enviorment "
y: because a habitat is a place that supports an organisms needs and the y section has the same statement.
Diatoms are single celled algae that form a silica based cell wall. They are broken up into two major groups, the centric diatoms and the pennants diatoms, based on the form of their frustule.