B. The sperm cells swim to the egg cells through their watery surroundings.
Answer:
meiosis I
Explanation:
Independent transmission is Mendel's second law. Like any Mendel law it is based or is about the transmission of alleles. Therefore, the law of independent transmission is based on the fact that when forming gametes, the alleles of one gene are segregated independently before the segregation of the alleles of another gene. This second law can not only be applied to the characters that Mendel analyzed, which were two genes with two possible alleles, this law is fulfilled with more than two characters. We must bear in mind that alleles are the different forms that a gene can present.
On the other hand we have the concept of meiosis I which is a type of cell division that in animals generally gives rise to gametes for sexual reproduction or sexual spores (in plants and fungi). That is to say in mitosis we find that there is only a cell division between homologous chromosomes, so that from a tetraploid number (4n) we pass to a diploid number (2n). While in meiosis we find that there are two cell divisions in which we go from a tetraploid number (4n) to a haploid number (n). This means that this is a reductive process. These haploid cells will join together to give rise to a diploid cell. Another important concept to consider in meiosis is the formation of chiasmas that are created between non-sister chromatids, thanks to this phenomenon the exchange of genetic material occurs.
The immune system has many kinds of white blood cells to fight infections. HIV finds the white blood cells, called CD4 cells. But with cancer the white blood cells are being killed off.
Proteins, among the most complex of all organic compounds, are composed ofamino acids , which contain carbon, hydrogen, oxygen, and nitrogen atoms. Certain amino acids also have sulfur atoms, phosphorus, or other trace elements such as iron or copper.
Answer is d because glaciers are not primary
