Answer: A) Two atoms share electrons so they can fill their outer shells
Explanation: A covalent bond is a type of bond formed by sharing equal number of electrons between two non-metal atoms so that both of them can attain a stable octet or duplet structure of noble gases.
In covalent bonding, there is no loss or gain of electrons between atoms. For example, the formation of chlorine molecule, chlorine atom has seven electrons in its outermost shell, remaining one electron to attain an octet structure of noble gases. Two chlorine atoms share one pair of electron, each chlorine atom donating one electron to form a pair so that each atom in the chlorine molecule attains an octet structure..
the Answer is C. because recessive means two of the same alleles and non dominant
Blood enters the pulmonary vein with close to 100% of the blinding site for oxygen saturated.
Giving care to a patient who is bleeding without wearing protective barriers such as disposable gloves could be dangerous because it can expose an individual to infections. The best way for you to care for this person is;
1. to have him/her to hold or apply pressure on the wound on his forehead.
2. Cover the cuts on the forehead with a bandage and ensure immediate washing of hands after providing care for the person.
Answer:
b, a, d, c, e
Explanation:
The lac operon is called lactose operon is a cluster of genes with a promoter. The bacteria uses lactose as the source of energy by the proteins coded by genes. This is present in prokaryotes.
The regulatory gene codes for repressor protein. The repressor binds to lactose and prevent its binding to operator. In the absence of lactose repressor gets activated and binds with operator. Thus, RNA polymerase is prevented from binding the promotor. The transcription of genes inhibited. Thus correct order is b, a, d, c, e.
