Answer:
C. Joining of self-replication molecules into protocells.
Explanation:
For the origin of life, at least three conditions are needed.
- there must have been a supply of replicators, that is, self-replicating molecules.
- copying of these replicators must have been subject to error through mutation.
- the system of replicators must have required a continuous supply of free energy and partial isolation from the general environment.
The radiation received from the sun on the early earth must have fulfilled the requirement of mutation. The mutation is necessary for bringing variation in the genetic material thus driving evolution. To protect the self-replicating molecules from the external environment and to keep them together, the molecules must have been enclosed in a membrane barrier, which should be selectively semipermeable, to facilitate the exchange of molecules.
Answer:
T T A G C C G T A A T G is the complementary DNA strand.
Explanation:
A=T G=C C=G T=A
this is the key to all DNA complementary strands.
(not sure what the "O" was at the end but- it's ok)
Hope this helps! :)
Answer: Option D) the type of bonds between the monosaccharides
Explanation:
Polysaccharides in plant foods that serve as a stored form of energy include starch, or an indigestible material (fiber) like Cellulose.
Starch consists of monosaccharides i.e glucose units with an alpha α-1, 4-glycosidic bond; while cellulose fiber has the same glucose units, but linked by beta β-1, 4-glycosidic bonds
Thus, both polysaccharides differ based on the types of bonds between the monosaccharides.
Recall your structures, Cell membrane.
Answer:
Cell wall & cell membrane
Explanation:
T maintain the shape of cell and vacuole also maintain the shape of cells in plants. It is the cell wall structure that helps maintain the shape of cell. Cells which doesn't possess such definite cell walls are irregular in shape.
