Which statement would be used in an argument against the use of human embryonic stem cells for therapy? A. Obtaining embryonic stem cells for use in therapy requires the destruction of embryos. B. Embryonic stem cells are limited in their ability to become different types of cells. C. It is difficult to grow embryonic stem cells in laboratory cultures, so they are not a practical choice for stem cell therapy. D. Embryonic stem cells originate in plants, so the likelihood of rejection by a patient's body is high.

A.Obtaining embryonic stem cells for use in therapy requires the destruction of embryos.

Explanation:

Research involving human embryonic stem cells is subject to ethical and political debate because these investigations involve the destruction of human embryos. Stem cells have a series of advantages in the field of organ/tissue regeneration, to investigate the etiology of degenerative diseases, therapeutic cell cloning, etc. However, in many countries, the moment where life begins is a controversial point, and therefore this issue must be defined clearly before research.

i would have to say autosomal

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation: