Answer:
C. Double helix
Explanation:
The twisted ladder shape that DNA has can also be called a double helix.
It is in the shape of a helix, which is similar to a 3D spiral shape.
It is called a double helix because DNA is made up of two DNA helix strands that are intertwined.
So, C is the correct answer.
Answer:
Without an oxygen atmosphere very few things could live on the early Earth. Anaerobic bacteria were probably the first living things on Earth. The early Earth had no oceans and was frequently hit with meteorites and asteroids.
Explanation:
The answer is letter a. loop
Answer:
Dehydration is a concern since dehydration can lead to severe complications, such as seizures, swelling of the brain, kidney failure, shock, coma and even death. Signs and symptoms of dehydration include: Headache. Dizziness or lightheadedness.
Explanation: