Answer:
True. You can get vitamin A as "preformed vitamin A" which is already active and/or you can get vitamin A as carotenoids which the body can turn into active vitamin A.
Explanation:
There are two different types of vitamin A that can be obtained from food:
1. Preformed vitamin A, which is already active, is found in animal products such as beef, fish, poultry and dairy products.
2. Provitamin A, which is the inactive form, is found in plant-based foods, such as fruits and vegetables. The most common type of provitamin A is β-carotene, which is a carotenoid that the body can turn into active vitamin A via an enzyme named β-carotene 15,15'-monooxygenase.
Oceanic crust is denser / thinner than continental crust so the denser oceanic crust is going to bend and get pulled under the thicker/stronger continental crust.
Answer:
c. The molecule responsible for making the blue color is RNA.
Explanation:
Tube (a): DNA, RNA and proteins present ⇒ BLUE
Tube (b): DNA and RNA present ⇒ BLUE
Tube (c): DNA and proteins present ⇒ COLORLESS
Tube (d): RNA and proteins present ⇒ BLUE
RNA is the only molecule that is present every time the chamical is added and the tubes turn blue, and not present when the color doesn't change, meaning in tube (c) there's no reaction with the added chemical.
In conclusion, RNA is the only molecule reacting with the chemical and responsible for blue appearance.
A. Trapping an organism in a environment with extremely limited air disabled cellular respiration aka giving cells the proper oxygen they need
