The Cretaceous mass elimination denotes the limit between the Mesozoic and Cenozoic times. It was a mass termination of some seventy-five percent of the plant and creature species on Earth that happened over a topographically brief timeframe for more than 66 million years.
Answer:
The correct answer is - It is the most common genetic disease in the United States.
Explanation:
Cystic fibrosis is the genetic disease that affects the several body system and organ such as lungs and digestive system. This hereditary disease is autosomal recessive.
It is not common in ethnic populations such as African Americans and Asian Americans while in white population of US it is a very common genetic disease as it occurs in one individual in every 2500 to 3500 white infants.
Thus, the correct answer is - It is the most common genetic disease in the United States.
Answer:It has an alternating chemical phosphate and sugar backbone, making the 'sides' of the ladder. (Deoxyribose is the name of the sugar found in the backbone of DNA.) In between the two sides of this sugar-phosphate backbone are four nitrogenous bases: adenine (A), thymine (T), cytosine (C), and guanine (G).
Explanation:
<span>Intracellular digestion takes place in animals without a digestive tract, in which food items are brought into the cell for digestion. Extracellular digestion is a process in which animals feed by secreting enzymes through the cell membrane onto the food.</span><span>
</span>
