Very powerful microscopes were needed before cells could be observed in detail
Answer:
A) Calcitonin injection
Explanation:
Parafollicular cells or C-cells of the thyroid gland produce a hormone which is involved in the regulation of calcium levels in the blood. This hormone is Calcitonin. It works in an antagonistic manner with the Parathyroid hormone (PTH). Calcitonin decreases the calcium level in the blood by increasing absorption of calcium ions in bones. In osteoporosis, when the patient is given the injection of hormone calcitonin, it produces and increase in bone mass because it negatively affects the rate of absorption of bone by the osteoclasts.
The best and most correct answer among the choices provided by the question is the fourth choice "all of the above."
<span>Bacteria vary from species to species, thus assigning many common traits to bacteria is difficult. Bacterialspecies are typified by their diversity. There are three notable common traits of bacteria, 1) lack of membrane-bound organelles, 2) unicellular and 3) small (usually microscopic) size.</span>
I hope my answer has come to your help. God bless and have a nice day ahead!
Because for one plants reproduce a lot more than animals by up to 100 seeds coming from each plant. Also if there were more animals plants would run out.
