Answer:
D
Explanation:
The double helix is a description of the molecular shape of a double-stranded DNA molecule. In 1953, Francis Crick and James Watson first described the molecular structure of DNA, which they called a "double helix," in the journal Nature.
Answer:
Option-4
Explanation:
Cow milk allergy or the cow milk protein allergy occurs when the allergy is caused by the proteins of the cow' milk when provided to the infant baby during the first 6 months.
The allergy is caused when the immune system of the infants consider the proteins of the cow milk as a foreign substance or antigens. These antigens activate the immune response which releases the chemicals and infant develop the symptoms of allergy.
Thus, option-4 is the correct answer.
Answer:
Yes.
Explanation:
Yes, there is same effects of isotonic, hypotonic, and hypertonic extracellular environments on plant and animal cells because both cells are more similar to each other. If a plant or animal cell is placed in a hypertonic solution, water will go outside the cell, and the cell will shrink, in isotonic environment, there is no water movement inside or outside of the cell, so there is no change in the size of the cell, while on the other hand, if a cell is placed in a hypotonic environment, water will enter the cell, and the cell will turgor.
<span>A population's growth is strongly influenced by the proportions of individuals in different age brackets, which in turn is influenced by economic development.</span>
