Hydroxyapatite refers to one of the prime components of and an important element of usual teeth and bone. It forms the matrix of teeth and mineral of the bone. It is the hydroxyapatite molecule that gives the teeth and bones their rigidity. These molecules can combine together to produce microscopic clumps.
About seventy percent of the bone comprises of the inorganic mineral hydroxyapatite that comprises calcium carbonate, calcium phosphate, calcium hydroxide, calcium fluoride, and citrate.
I believe the answer is C, as when the sun is tilted at different angles different places will get different amounts of sunlight.
Answer:
Yes, shrubs are affected.
Explanation:
The development of a pine and then a hardwood forest affected populations of shrubs because pine and hardwood trees are higher in length than shrubs so the shrubs did not gain sunlight and also all the nutrients present in the soil is extracted by the pine and hardwood trees. The shrubs present below the pine and hardwood trees slowly removes from that environment due to unavailability of sunlight and nutrients.
The corrrect option is D.
Since the scientist was trying to determine if substance A affect the rate of reaction of X and Y, the best thing to do is to make substance X and Y to react together first, he should then measure the time taken for the reaction to take place. Next, he should make X and Y to react together again, but this time in the presence of A. The time taken for the reaction to occur should be measures. The scientist can now compared the two time measurements and decide if there are difference between them or not.
Answer:
The correct answer is- Resistance
Explanation:
The ability of any organism in a population to tolerate a chemical like insecticide, pesticide or antibiotic which is designed to kill it or slow its reproduction is called resistance.
For example, the antibiotic resistance is seen in some bacteria like MRSA(Methicillin-resistant staphylococcus aureus). They gain this resistance because they have some variant traits in their genome which provide them resistance against these chemicals.
These individual are selected through natural selection when the environmental condition changes and become adverse. So the correct answer is resistance.
