Vitamin B12 is more difficult to obtain on a vegan diet since Vitamin B12 is mostly found in most meat and dairy products (which vegans cannot consume). Therefore vegans have to incorporate foods with high amounts of Vitamin B12, such as soy products and to talk to their doctor about taking supplements to make sure they are getting enough.
Vitamin B12 deficiency can cause anemia and nervous system injury
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The human body contains more than 650 different muscles in three
categories, all under the control of the nervous system. Striated, or
skeletal, muscles, come under conscious, or voluntary, control. Smooth,
or visceral, muscles, such as those found in the digestive tract, are
connected to organs and perform their work outside of voluntary control.
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Having regular leaves would cause cacti to die faster due to the climate. Leaves are thin and dry easily without water. Cacti do not need leaves because it is a body
Answer: (D) variations remain within created kinds.
(E) all genetic information comes from preexisting genes.
Sexual reproduction is a mode of reproduction in which male and female gamete fuse to form a new organism. The male and female gametes they fuse to form zygote after fertilization. The method of sexual reproduction involves the segregation of genes and transmittance of random genes from parents to offsprings. Therefore, variations occurs in the new organism and the new organism is not exactly identical to either of the parents both physically and genetically but similarities are present. All the genetic information comes from the preexisting parents genes. Variations are limited to that extent in sexual reproduction that it does not result in production of completely different kind of organism distinct to parents.