Answer:
B
Explanation:
Because transcription is the process that provides the vital information for a cell too make proteins. If a cell couldn't do that, then no proteins can be produced.
Answer:
The correct answer is air enters the - Bronchi and smaller tubes called- Bronchioles.
Explanation:
In humans, the respiratory system includes specialized organs like nose, the pharynx (or throat), oral cavity, larynx, the trachea, the stem bronchi.
The process of respiration starts with inhaling the air through nose and mouth which travels down to the back of your throat and windpipe called trachea. The trachea then divides into air passage tubes called bronchi which ramify within the and is known as the bronchioles.
Thus, Bronchi and bronchioles are the correct answer.
Answer:
It's based on the natural radioactive decay of certain elements, such as potassium and carbon.
Explanation:
Answer:
To establish the age of a rock or a fossil, researchers or scientists use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.
Explanation:
Chemical and gaseous exchange takes place only across capillary walls
Sorry for the late answer but I hope that's still help !
Over the time, HIV or human immunodeficiency is a lentivirus under the retrovirus subgroup has been causing HIV infections and AIDS or acquired immunodeficiency syndrome in humans. This virus destroys the white blood cells or the CD4+ cells to be specific which is crucial in the human immune systems.
The person infected then is less equipped to fight infections or diseases which will then develop into AIDS.
Answer:
Since there is presence of excess tryptophan, the trp operon will be switched off, since the bacterial need not to synthesize.
Explanation:
Understand the following.
The trp operon is a group of gene that encode biosynthetic enzymes for the amino acid tryptophan.
The transcription gene in the operon is switched off when the tryptophan is in excess but is switched on by the bacterium when the tryptophan is low, so that more tryptophan can be produced.