Red blood cells will swell and burst. The
reason behind this is that red blood cells are okay when they are in
the plasma (the watery part of the blood) because the solutes in plasma
are so well balanced that plasma is rendered isotonic. An isotonic
solution is a type of solution that has the same salt concentration as
its surrounding environment and thus the substances around it e.g. cells
neither gain nor lose water. In the blood plasma, the red blood cells
neither lose nor gain water and so they remain intact.<span>However distilled
water is hypotonic (has less or no solutes) and therefore osmosis will
take place when red blood cell which have a higher solute concentration
are placed in it. Water molecules will leave the distilled water and
pass into the red blood cells through the semi-permeable membrane of the
cells in an attempt to equalize the difference in osmotic pressure on
either side of the membrane. In so doing, water will accumulate in the
cell which will then swell to capacity and ultimately burst.</span>
B , d and e. I believe that is correct
Hi!
Homologous chromosomes are found in any normal/basic diploid cell and a homologous pair of chromosomes will be identical genetic copies of each other.
Being that both of these answer choices appear to be correct, the answer would be letter choice (E) two of the above are true?
Hope I could help!
- Peaculiar
Answer:
Age of rock = 500 million years
Explanation:
The age of the rock can be calculated by determining the number of decays (half-lives) the parent rock has undergone.
The half-life of a radioactive material is the time it takes for half the the quantity present in that material to decay or disintegrate.
The half-life of the rock sample = 250 million years
Amount of parent rock left in the rock sample = 25% = 1/4
Number of half-lives, n required is given as (1/2)ⁿ
Number of half-lives undergone by the parent rock sample to be 1/4 of the original sample is given as: (1/2)ⁿ = 1/4
1/4 = (1/2)²
Therefore, n = 2
Age of rock = number of half-lives * half-life (in years)
Age of rock = 2 * 250 million years
Age of rock = 500 million years
