Answer:
There are two ways
Explanation:
The first way a star can become a supernova is when the star accumulates matter from a nearby neighbor until a runaway nuclear reaction ignites
The second way a star can become a supernova is when the star runs out of nuclear fuel and it collapses on itself.
I hope this helps.
Answer:
B. Individuals within a population exhibit genetic variation and those that are best adapted to their environment survive.
Explanation:
Nature poses challenges time to time to all the living organisms in the form of harsh climate, scarcity of food, natural disasters such as floods, drought, etc. Such challenges enable some organisms to survive better than the others in the same environment and are said to be selected by the nature.
This capability to survive is also termed as fitness by some scientists. Darwin however only referred to the reproductive fitness which means those organisms who are better fit in their environment produce more number of offspring than others.
Darwin used the phrase "Natural selection" for this and said it is the natural selection which is responsible for evolution.
Answer:
The electrical and diffusion potentials for K+ will be equal in magnitude and opposite in direction.
Explanation:
The cell potential may be defined as the potential difference between the inside of the cell and outside the cell. This difference is important for the transmission of nerve impulse.
The equilibrium condition may be defined as the condition at which the exit and the entrance of the ions will be equal. As the information in the question, Only potassium ions will move inward and outward of the cell. The potassium ions will move in opposite direction since the equilibrium has been reached.
Thus, the correct answer is option (D).
Answer: your answer is correct A. fact one
Answer:
The main purpose of cell respiration is to:
b. convert the chemical energy in sugars into ATP
