I believe that the answer would be B. Ichthyosaurs. Hope this helps :)
Answer:
thymine adenine cytosine and guanine
Explanation:
hope this helped im not 100 percent sure
The diffusion of chemicals and gases in and out of cells is an essential activity in human organs. Diffusion of oxygen and carbon dioxide gas occurs in the lungs. Diffusion of water, salts, and waste products occurs in the kidneys. Diffusion of calcium from food into cells occurs in the intestines.
What type of diffusion?
Answer:
All the possible alleles for a gene with multiple alleles cannot be expressed by single individual
Explanation:
Gene pool refers to the sum total of all the alleles of all the genes which are present in a population. Human beings are diploid organisms. One individual can have only two possible alleles for a gene. A gene can have two or more than two alleles. Since all the possible alleles for a gene with multiple alleles cannot be expressed by single individual, a gene pool cannot be made of one individual.
The statement given in the question is TRUE; the health status of the American population is poor in international comparison.
America is one of the richest country in the world, but it is not among the healthiest. Despite the increase in life expectancy in past decades, Americans still live shorter lives and experience more injuries and illnesses compare to other countries of the world.
The major health conditions in which the American fare badly compare to other wealthy countries of the world include: infant mortality, injuries and homicides, HIV and AIDS, drugs related mortality, obesity and diabetes, hearth diseases, sexually transmitted diseases, teenage pregnancy, chronic lung diseases and disability.