<span>The correct answer is calcifediol or calcidiol.</span>
<span>It is a prehormone that is produced in the liver. The mechanism of production includes hydroxylation of vitamin D3 (cholecalciferol) by the enzyme cholecalciferol 25-hydroxylase. Because it is the major form of vitamin D in the blood, it is considered the best indicator of vitamin D status. Calcidiol is converted in the kidneys into calcitriol which is the active form of vitamin D. </span>
The answer is A. Animals.
First of all humans and insects belong to the group of animals. There are about 1.6 million known species of animals which include many more groups. At least 1 million of animal species are insects. Humans belong to the one only species Homo sapiens of Hominina clade. Talking <span>about </span>plants, there are about 300.000 species, leaving animals as the right answer.
Answer:
System 1 breaks food down into nutrients,
and system 2 transports the nutrients to cells
in the body.
<span>The correct answer is Pheromone. This isn't only common to moths, but mostly to all animals. Animals release pheromones to attract each other and procreate to ensure that the species continues existing. Sugars and hormones are completely different things and are unrelated to sexual attraction in animals.</span>
Answer:
Option B is correct.
Explanation:
Carbohydrate fermentation test; its main purpose is to know if a bacteria can ferment a specific carbohydrate or not. The test can be used for distinguishing bacterial species.
When fermentation of carbohydrate occurs, gaseous acids are produced. This production of the acid lower the pH of the medium undergoing the test, which can be detected by the color change of the pH indicator.
The Color changes only when sufficient amount of acid is produced. Phenol red can easily detect single acid production but METHYL RED NEED MORE ACID.
