Difference between synthetic and natural

The tubes transporting minerals and water upward are called ?

Anormal appearing couple is found to be heterozygous recessive for albinism both have the genotype aa the gene responsible for albinism is recessive to the normal pigment-producing gene what are the changes of their children being albino

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs