Answer:
b. false
Explanation:
The cell cycle consists of three states: Interphase, Cell division (mitosis) and Resting.
Interphase is composed of phases G1, S and G2. during this state the cell replicates the genetic material of its chromosomes to prepare itself for cell division
In G1 the cell synthesizes mRNA and proteins that the cell will need during mitosis.
In S the cell replicates the genetic material of its chromosomes to prepare itself for cell division. At the end of this phase each chromosome is composed of two sister chromatides.
In G2 the cell grows and and more proteins synthesized for mitosis.
Mitosis is the production of two daughter cells from a sinlge one. During the entire mitosis the chromosomes are duplicated in the cell until finally, the genetic material is distributed in two cells after cytokinesis.
According to the above, it can be seen that the chromosomes in a cell that is in the cell cycle do not necessarily have sister chromatids. For example, chromosomes during G1 do not have sister chromatids.
They must live near water because their skin needs to absorb water and oxygen otherwise their skin dries out and they can die
Answer:
C
Explanation:
Nuclear fusion is the process by which the Sun produces its energy. It converts mass into energy, which is radiated over most of our solar system. The pressure from the fusion reactions keeps the star from collapsing.
Without the Sun's energy, in the amount we receive, the Earth would likely be entirely frozen and beyond deathly cold. Take Pluto as an example :)
Answer: A
Evolution is the idea that species change over time, and natural selection is a mechanism by which evolution takes place.
Answer:
The answer is "planet C"
Explanation:
The answer would have to be C because of the mass of the planet, some people would say that is not exactly true in a lot of cases but in your problem the planet with the most gravitational exert would have to be planet C .One last thing you should know...'the Universal "LAW" of gravitation'. Laws/Principles can only be verified and cannot be proved. Laws are conclusions based on experiments.
