7) A) secondary oocyte; vesicular follicle B) secondary oocyte; secondary follicle C) ovum(egg); vesicular follicle D) primary oocyte; secondary follicle Answer: A 8) Development of the oocyte and follicular growth occur in the ________ of the ovary. 8) This is the end of the preview.
Evolution of the atmosphere. Scientists believe that the Earth was formed about 4.5 billion years ago. Its early atmosphere was probably formed from the gases given out by volcanoes. It is believed that there was intense volcanic activity for the first billion years of the Earth's existence.The early atmosphere was probably mostly carbon dioxide, with little or no oxygen.There were small quantities of water vapour, ammonia and methane. As the Earth cooled down, most of the water vapour condensed and formed the oceans.ts early atmosphere was probably formed from the gases given out by volcanoes. It is believed that there was intense volcanic activity for the first billion years of the Earth's existence. The early atmosphere was probably mostly carbon dioxide, with little or no oxygen.
much of the energy were produced when the planetesimal that formed the planet collied with each other 2. the increasing weight of Earth's outer layers compressed the inner layers which generated more energy 3. radioactive materials that emit high-energy particles were very abundant when earth formed. î î î.