Answer:
The correct answer is mast cells.
Explanation:
Mastocyte also is known as a mast cell refers to a migrant cell of connective tissue, which comprises various granules high in heparin and histamine. Mainly it is a kind of granulocyte obtained from the myeloid stem cell, which is a component of the neuroimmune and immune systems. These cells are similar to basophils, however, they are found within the tissues rather than circulating in the blood.
Answer:
adenine pairs with Thymine and guanine always pairs with cytosine respectively
Explanation:
In DNA nucleotide subunits, there are four nitrogenous bases:
- Adenine (A)
- Thymine (T)
- Cytosine (C)
- Guanine (G)
Each of these bases can be divided into two categories: purine bases and pyrimidine bases.
Adenine and guanine are examples of purine bases. This means their structure is a nitrogen-containing six atom ring joined with a nitrogen-containing five atom ring that share two atoms to combine the two rings.
Thymine and cytosine are examples of pyrimidine bases.
Note that RNA replaces thymine with a different pyrimidine base called uracil (U).
The complementary base pairing rule, Chargaff's rule states that DNA base pairs are always adenine with thymine (A-T) and cytosine with guanine (C-G). A purine always pairs with a pyrimidine and vice versa. However, A doesn't pair with C, despite that being a purine and a pyrimidine.
Explanation:
Deficiency of Vit C may lead to Scurvy which is characterized by bleeding gums and weak teeth.
This is because Vit C (ascorbic acid) helps in keeping healthy bones, teeth and gums
I believe the correct answer is the final option - <span>If Earth formations can change over time, it is possible that even life on earth could change over millions of years.
Given that Darwin proposed his ideas about the origins of species and evolution, this is the only possible option to choose. It is impossible that life doesn't change at all, and millions of years are a long time to implement those changes. So it is only natural that organisms can change as much as the Earth can.
</span>