Can I get treated for an STD while Iâm pregnant? It depends. STDs, such as chlamydia, gonorrhea, syphilis, trichomoniasis and BV can all be treated and cured with antibiotics that are safe to take during pregnancy. STDs that are caused by viruses, like genital herpes, hepatitis B, or HIV cannot be cured.
Explain how multicellular life evolved from unicellular life. The first evidence of multicellularity is from cyanobacteria-like organisms that lived between 3 and 3.5 billion years ago. In order to reproduce, true multicellular organisms must solve the problem of regenerating a whole organism from germ cells (sperm and egg cells), an issue that is studied in developmental biology. Therefore, the development of sexual reproduction in unicellular organisms during the climax Mesoproterozoic is thought to have precipitated the development and rise of multicellular life
Amphibians first evolved from bony-finned fish during the Devonian period, between 419 million and 359 million years ago, and spawned new branches on the evolutionary tree of life that brought us to where we are today. Researchers found that both fish and land animals possess bits of DNA called Hoxa and Hoxd genes.