Answer:
1. Uracil
2. Ribose
Explanation:
DNA and RNA are both types of nucleic acids. Although they are made up of similar constituent molecules, they are slightly different. All nucleic acids have three major constituents viz: nitrogenous base, pentose sugar and phosphate group.
The four nitrogenous bases found in DNA are Adenine, Guanine, Cytosine and Thymine. However, three of this bases are found in the RNA molecule but one different one called URACIL, which replaces Thymine is found. Also, the pentose (five-carbon) sugar found in DNA is deoxyribose while that of RNA is RIBOSE.
Abiogenesis theory:
--》Aristoteles
Biogenesis theory :any process by which lifeforms produce other lifeforms.
--》Francesco Redi
--》Louis Pasteur (confirmer of Redi's theory)
Panspermia theory: Life comes from the other planets.
--》Anaksagoras (created this theory first)
--》Lord Kelvin
--》Svante Arrhenius
--》Francis Crick
Heterotroph theory :
--》Wöhler
--》Miller
--》 Fox
Evolution Theory:
--》Darwin
--》Bacon
--》Descartes
--》Leibnitz
--》Lamark
--》Georges Buffon (creator of the Evolution theory in modern science)
In addition;
Alexander Graham Cairns-Smith = Organic chemist = Origin of life
Hope it helps!
#MissionExam001
Answer:
freeze and sink over and over until the entire lake was frozen.
Explanation:
This would eliminate many aquatic organisms and produce a system with far fewer life forms in lakes which freeze periodically.
If the area is close to an interstate or if it is crowded