Answer: Sex cell is the correct answer.
The most common form of entry of the phosphorus is by human use of the fertilizers which is released into the groundwater.
Most of the fertilizers being used in agriculture contains nitrogen and phosphorus which is carried to the aquatic ecosystem through surface runoff. When the tropical rainforest are cut down by humans and fertilizers are being used in large amounts the nutrients stored in plants or rocks are washed by the heavy rains and they reach groundwater or other water bodies. Therefore, the humans alter the natural phosphorus cycle majorly in several mentioned ways.
Answer: The correct answer is : D) The bone would be more flexible.
Explanation: The calcium in the bone matrix is found in crystals called hydroxyapatite, which is exactly a biological material formed by calcium phosphate, which represents a 99% deposit of body calcium. Hydroxyapatite is the inorganic portion of the bone matrix.
A) Thylakoid
B) Lumen
C) Granum
D) Stroma
