A double helix is <span>a pair of parallel helices intertwined about a common axis, especially that in the structure of the DNA molecule. or in other words a double spiral.</span>
I’m not sure if that’s the answer but what immediately pops up in my mind is the food chain. Primary consumers (herbivores) consume producers (plants). Secondary consumers consume primary consumers etc. At the end of the day, all kinds of animals die and decompose, providing nutrients for producers to grow, continuing the circle of life.
Lion is a top predator that hunts secondary consumers. Simba’s father died and contribute to the circle of life. I hope it gave you some pointers!
Answer: Water can hold an unlimited amount of oxygen.
Explanation:
Water cannot hold an unlimited amount of oxygen because it would get to a point where it is saturated as it needs to hold Hydrogen as well. Air on the other hand, has significantly more space for oxygen as it contains only 21% and can keep taking more.
Underwater organisms need oxygen for respiration and a small decrease in the oxygen available in water affects aquatic life because they rely on it to survive.
Answer:
Alzheimer's disease
Explanation:
Neurodegenerative disease is the condition which is caused when the fundamental unit of the nervous system called neurons degenerate. The two main neurodegenerative diseases are Alzheimer's disease and Parkinson's disease.
The Parkinson's disease is the disease which affects the musculoskeletal system but the Alzheimer's patient is not able to recall the memory and events, therefore, interfere with the deterioration of the cognitive and emotional abilities.
Thus, Alzheimer's is the correct answer.
