Im not sure i know its in the membrane, i would have to go with B but i could be wrong
The right answer is myelin.
Vitamin B12, also called cobalamin is a vitamin B group, so it is water soluble. It is a very important vitamin for the functioning of the brain, the nervous system and in the synthesis of DNA. This vitamin must be provided by the diet, the populations most at risk of deficiency are vegans as well as the elderly because of their low consumption of food of animal origin.
Vitamin B12 is essential for the good health of the nervous system: It is particularly at the level of the myelin sheath that vitamin B12 plays a role in thus participating in the protection of nerve cells.
Answer:
Single-celled organism are not classified as an animal because animals are multicellular organisms i. e. made of more than one cell while single celled organisms are unicellular organisms i. e. made of one cell. In single celled organisms, one cell perform all activities while in animals special cells are responsible for particular function. There are some single celled organisms are autotrophic while animals are heterotrophic in nature.
Pollution is the introduction of contaminants into the natural
environment that cause adverse change. Pollution can take the form of
chemical substances or energy, such as noise, heat or light. Pollutants,
the components of pollution, can be either foreign substances/energies
or naturally occurring contaminants. Pollution is often classed as point
source or nonpoint source pollution.
Hope this helps :p
C, decrease.
If the trait is easy to be seen by predators, they will be caught more often than those without the trait, thus reducing the frequency of the trait.
