Ablood vessel with a thick layer of smooth muscle and elastic fibers is a. a vein. b. an artery. c. a capillary. d. the vena cava.

9. wind power creates pollution. water air soil noise

Complete the statements to identify the first two steps of meiosis i. (1 ) the first and longest step of meiosis i is called i. (2)the second step of meiosis i is called i.

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