Answer: Possession of Valves
Explanation: Veins possess valves which ensures that blood flows in only one direction. Valves helps blood to flow back to the heart against gravitational force.
Arteries don't have valves because the pressure originating from the heart is capable of causing the blood to flow in one direction.
Physical chemists study matter and energy, and there is chemical reactions in your body, and all living things have elements, like carbon.
I would say D
Created by Rosalind Franklin using a technique called X-ray crystallography, it revealed the helical shape of the DNA molecule. Watson and Crick realized that DNA was made up of two chains of nucleotide pairs that encode the genetic information for all living things.
Carbohydrates glycaemic index (GI)
Glycemic index estimates
carbohydrates containing food based on how they increase the glucose in the
body. Foods are rated by comparing them to a reference food. Foods with high glycaemic
index increases blood glucose than foods with average or low glyceamic index. When taking foods with high GI, low GI foods
should be combined with it in order to balance the meal. Examples of low GI
foods are corn, most fruits, and yam. Medium GI foods include pita bread and
whole wheat. Puffed rice, instant oatmeals are examples of foods with high GI.
DNA and RNA are both found in the nucleus of a cell. RNA is moved out of the nucleus through pores. Hope this helped.
