They separate during meiosis I is true of tetrads.
Explanation:
In Prophase 1, tetrads are formed. Each chromosome has two sister chromatids. When two homologous chromosomes align for crossing over they have four parts and these are termed tetrads.
When homologous chromosome separate tetrads get broken. Tetrads are not present in mitosis because no crossing over takes place in mitosis.
In Anaphase 1 homologous chromosome separate by getting pulled by spindle fibres forming two haploid cells and tetrads get separate.
The fossil record is important for evolution because they show that life from the past is different from life today. Scientists, such as paleontologists can determine the age of fossils by using technology provided today; known as radiometric dating, to sort them and determine relationships with organisms today. It allows us to get a whole view on the possible relations of today.
Homologous Anatomical Structures provide such a big support to the thought of evolution as well. They are structures that are similar in some organisms because they were inherited from a common ancestor. The functions may or may not have been used by the past ancestors, either. This supports evolution widely due to us seeing what we've evolved from, and what animals have evolved from. It allows us to determine ancestors as well.
Embryology is a very good one, looking at the early stages of animal development. This allows scientists learn about how different species have evolved over time. It supports evolution largely due to this. A very good branch of science, spreading the thought of evolution each and everyday.
Apologies- I don't have an answer for the other explanations.
During blood typing, the blood plasma is checked for antibodies. This is what is meant by "anti" in the statements. Keep in mind that if the antibody against a specific blood type is present, the blood cannot have that type. So, if anti-A is present, the blood type is not A.
Moreover, the Rh antigen determines the positive (present of Rh) and negative (absence of Rh) nature of blood type. If the anti-Rh is present, the blood type is negative. Using this information, we see that:
a) A negative
b) B positive
c) AB positive
d) O negative (O because both anti-A and anti-B are present)
e) <span>AB negative (AB because neither anti-A and anti-B are present)</span>
Cause it views the structure of your bones using a solar
