Answer:
Before meiosis actually begins, the DNA that is packaged into chromosomes must be fully copied. ... DNA replication occurs in the same fashion as it does during mitosis. After replication, the homologues are doubled, and each chromosome now has a homologous pair
The answer is A, cells, as viruses infiltrate cells, make copies of themselves in them, and then lyse the cell and spread.
Answer:
An observation cannot be an inference, because an observation takes place before an inference can be determined.
Explanation:
Answer:
prostaglandins
Explanation:
Prostaglandins are eicosanoids (i.e. lipids) derived from arachidonic acid and related fatty acids. Prostaglandins are synthesized by many tissues in the body when they are damaged or infected in order to deal with such injuries/infections. They are hormone-like compounds involved in pain and inflammation. It is well known that the levels of prostaglandins change in the menstrual cycle of women, producing vasoconstriction of the endometrial vessels during menstruation and contraction of the muscles in the myometrium. High prostaglandin levels are characteristic of severe menstrual cramps.