<span>The correct statement is letter C. All arteries except the pulmonary artery carry oxygen-rich blood. Most arteries are responsible for the delivery of oxygen and nutrients to all cells and the pulmonary veins are the one who transfer oxygenated blood from the lungs to the heart.</span>
<u>Cross-sectional </u>research method
Explanation:
The cross-section research design is most widely used in healthcare based researches. It is type of descriptive research based on observational studies.
This research is usually done on a group of people and provides both qualitative (descriptive interpretations) and quantitative (statistical interferences) details.
This research is not a relational type of research and hence cannot be used to study, relate or compare about individual changes. The experiences, values, changes observed in individual cases are not taken into consideration.
For example, it is used to study a disease like cancer in a certain group or a population-based on variables like different sex, age religion, ethnicities, location etc of various people. It is not used to study about cancer in an individual person.
It is also not the causal type and cannot be used for cause and effect type of researches. Manipulation of variables is not possible with this research design.
The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms. When a neutral molecule has a positive area at one end and a negative area at the other, it is a polar molecule.
Thank you for your time on brainly , hope this answer helps. Have a great day!
Ans : C - enzymatic action on carbohydrates ( enzyme amylase catalyses carbohydrate to maltose here in the mouth )