Answer:
Wearing a bra does more harm than good – it does nothing to reduce back pain and weakens the muscles that hold up the breasts, resulting in greater breast sagging
Explanation:
It's the first option, hope this helps :)
Answer:
<em>Animalia is a kingdom which has different phyla. There are thirty six phyla in animal kingdom but nine are the major ones and they are – </em><em>Porifera, Cnidaria, Platyhelminthes, Nematoda, Annelida, Arthropoda, Mollusca, Echinodermata and Chordata. </em>
Explanation:
The organisms are classified on the basis of complexity. The complexity increases with increase in the mentioned phyla.
Humans are the most complex organism that perform several functions. The least evolved phyla is porifera and the most evolved phyla is chordata.
Answer:
"Each carbon atom has only three covalent bonds instead of the required four.
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Explanation:
In the covalent bond the chemical bonding takes place by distribution of electrons among the atoms. The electrons that has been paired are also termed as the bonding pairs, they are also very much constant and balanced of attractive and repulsive forces among atoms. This covalent bond helps in other unstable atom in getting stable, by archiving electron from other atoms which will help them in forming a complete electron shell.