Answer:
DNA mutation causes a change in the amino acid sequence for hemoglobin, which causes a change in the shape
Explanation:
Sickle cell mutation is a mutation that affect the production of red blood cell that is needed for the transport of oxygen in the bloods stream.
sickle cell mutation is a result of change in the amino acid which are building blocks of the protein hemoglobin.
The protein is what gives red cells their color, it has two subunits. The alpha
and beta subunit. There is a change in the arrangements of amino acid sequence and that is the basis for the sickle cell shape, beta subunit has valine an amino acid at position 6 instead of the glutamic acid. This alteration results in sickle cell problems that occur in people.
An onion is made-up of layers, which is separated by a thin skin or
membrane. The cells are easily visible under a high power, compound microscope
and the preparation of a thin section is straightforward.<span> </span>
<span>The correct
procedure for preparing a stained wet mount of onion epidermis are as follows.
First, place a piece of thin onion epidermis on a slide. Second, add one drop
of water and put one edge of a coverslip in the water drop, and then slowly
lower the opposite edge to the water. Third, put one drop of stain at one edge
of the coverslip and put a piece of paper towel at the opposite side of the
coverslip. Lastly, allow the towel to absorb some water so that the stain will
move under the coverslip and view it under a microscope. </span>
Answer:
Plants depend on the sun because of the energy it provides them.
Explanation:
Answer:
B) The mass of the reactants equals the mass of the products,
Explanation:
Given that the reaction is balanced, the mass of the reactants must equal to the mass of the products.
We know this by virtue of the law of conservation of mass.
The law of conservation of mass states that "in a chemical reaction, matter is neither created nor destroyed but atoms are rearranged".
Therefore, if the reaction is chemically balanced, the mass of reactants must be the same as the mass of the products in the reaction.
The second choice is the right one.
