Answer:
The correct answer is "uranium-238".
Explanation:
Uranium-238, is the most abundant isotope of the element uranium. Uranium-238 has not enough nuclear force to balance electrostatic forces between protons, and as a result, it is a radioactive isotope and its losing energy because of the spontaneous breakdown of its atomic nucleus. Uranium-238 has a half-life of 4.5 billion years and is used as fuel in nuclear reactors as well as for dating purposes.
Answer: The respiration is a process, which occurs in all living organisms. In respiration a food or substrate present in the body is broken down into components in the present or absence of oxygen.
Explanation:
The respiratory membrane surface area is marked by the surface acquired by the small bronchi that branches into small bronchioles. Further the bronchioles extent to the alveoli for respiratory gas exchange.
In case of a human adult there are 300 million bronchi which cover an area of 180m². So, the total amount of respiratory surface area in healthy adult is 180m².
Answer is b. Burning fossil fuels causes a decrease in the pH of ocean water making it more acidic.
Burning of fossil fuels release carbon dioxide and other harmful gases in the atmosphere. Carbon dioxide gets dissolves in the ocean to form carbonic acid. Due to formation carbonic acid, the pH of ocean water changes slightly. The average pH of ocean water was 8.2 slightly basic. Now it 8.1, it means there is 25 % increase in acidity of ocean water.
Carbon is an element
Oxygen is an element
The correct answer is Includes the Golgi apparatus and the endoplasmic reticulum.
The endomembrane systemrepresents a group of membranes and organelles that works together to modify, package, and transport lipids and proteins. It exists in eukaryotic cells only. The endomembrane system does not include all the organelles, like mitochondria, chloroplasts, or peroxisomes.
