A- valve replacement
b- stents
x- heart transplant
Answer:
Explanation:
Answer is: If the amount of snakes increased, the number of rabbits decreases.
A food chain refers to a linear arrangement of associations in a food web beginning from producer species and terminating at zenith predator species. In the given question, the increase of snakes population will eventually result in a decrease of rabbit population, a rabbit is a herbivore which is consumed by the higher predator snake.
Answer: Mouth.
Explanation:
The mouth is known to be performing both the tasks of chemical digestion and mechanical digestion.
The food is ingested through mouth and the teeth perform the process of mechanical digestion by breaking down the food particles into smaller particles.
Then the saliva gets mixed into the food and the enzymes(amylase) present in the saliva helps in the digestion of carbohydrates.
So, mouth is the organ that performs the process of both mechanical and chemical digestion.
Answer:
Rosalind's x-ray showed that the ladders of nucleotides were inside a double helix.
Watson and Crick built models with the ladders on the outside.
