I don't know which specific examples do you need to include, but I am pretty sure that as a regular animal, squirell might need such resources as <span>food, water, and a habitat. These three points are enough to satisfy basic needs.</span>
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.
<span>Sheaths of myelin produced by SCHWANN cells often enclose axons outside of the brain and spinal cord. Schwann cells are the cells in the peripheral nervous system that are responsible for producing myelin sheath that occurs around the neuronal axon. These cells get their name from Theodor Schwann who discovered them.</span>
Answer:
In order to control invasive species, we have implemented chemical controls such as pesticides, herbicides, and fungicides.
