Biology, 16.04.2021 14:00 markleal57151
A number of experimental investigations have provided evidence that the conditions
early in the Earth's history provided an environment capable of generating complex
organic molecules and simple cell-like structures.
(a) Describe one scientific model for the origin of organic molecules on Earth.
(b) Explain how RNA has the essential features of the earliest genetic material.
(c) Predict the effect that introduction of free oxygen in the atmosphere had on the
prokaryotic species of the time.
Answers: 3
Biology, 22.06.2019 18:00
The table below shows the elements that mainly comprise each of the four layers of earth: elements in layers layer main elements crust oxygen, silicon mantle iron, magnesium outer core iron, nickel inner core iron which of these elements make up the layer that is 0.2 to 1.1 percent of earth's total diameter?
Answers: 2
Biology, 22.06.2019 18:20
The term life cycle includes the entire process of: adults defending their young providing a conducive environment adults producing gametes fertilization the growth of the offspring to adulthood
Answers: 2
A number of experimental investigations have provided evidence that the conditions
early in the Ear...
Mathematics, 19.02.2021 20:40
Mathematics, 19.02.2021 20:40
History, 19.02.2021 20:40
Mathematics, 19.02.2021 20:40
History, 19.02.2021 20:40
Mathematics, 19.02.2021 20:40
Mathematics, 19.02.2021 20:40
Mathematics, 19.02.2021 20:40
Mathematics, 19.02.2021 20:40