Which of the Following Is Likely the Greatest Impact That

question 95

Multiple Choice

Which of the following is likely the greatest impact that organisms have ever had on Earth?

• A)Early cyanobacteria released hydrogen to Earth's atmosphere during the water-splitting step of photosynthesis.
• B)Early cyanobacteria released carbon dioxide to Earth's atmosphere during the water-splitting step of photosynthesis.
• C)Early cyanobacteria released oxygen to Earth's atmosphere during the water-splitting step of photosynthesis.
• D)Early cyanobacteria released nitrogen to Earth's atmosphere during the water-splitting step of photosynthesis.

---

Definitions:

Compact Bone

Bone that is denser and has fewer spaces than cancellous bone.

Osteocyte

A mature bone cell, derived from osteoblasts, embedded in bone matrix and involved in the maintenance of bone tissue.

Osteoclast

A cell that breaks down bone tissue, playing a critical role in bone remodeling and calcium homeostasis.

Osteoblast

A type of cell that is responsible for bone formation, secreting the matrix for bone and playing a key role in bone growth and healing.