Answer:
1. The Heartlies in the front and middle of your chest, behind and slightly to the left of your breastbone.
2. Right Atrium, Left Atrium, Right Ventricle, Left Ventricle
3. The valves prevent the backward flow of blood.
4. Arteries carry oxygenated blood while veins carry deoxygenated blood.
5. Eat Healthy, Stay Active
Explanation:
PLZ MARK AS THE BRAINLIEST
HAVE A GOOD DAY
: )
Answer:
The correct answer is They both contain carbon ,but only nucleic acid contain phosphorous
Explanation:
Carbohydrates are also called polyhydroxyaldehydes or polyhydroxyketones.Carbohydrates contain carbon,hydrogen and oxygen.For example glucose(C6H12O6).
On the other hand nucleic are composed of nucleotides that contain nitrogen base,ribose sugar and phosphate group.
The presence of phosphate group in the nucleic acid make it different from carbohydrate.
The sequence of sub units in a protein is most directly dependent on the DNA in the chromosomes in a cell
Answer: Option B
<u>Explanation:</u>
Any life events that takes place in a cell depends upon the central dogma of life that is the DNA getting transcribed into RNA and the RNA getting translated into protein, therefore we can conclude that the sequences of amino acids are based on the sequences of DNA that are present inside the chromosomes that are packed in a nucleus of a cell.
Answer:
The suprachiasmatic nuclei enable the nervous system to respond to daily light/dark alterations through their stimulation of melatonin.
Explanation:
Melatonin is a hormone produced naturally by the body. Its function is to regulate the body's circadian cycle. This hormone is stimulated and begins to act by changing between a light environment and a dark environment. This stimulation interacts with the suprachiasmatic nuclei making the nervous system understand this change and luminosity of the environment and respond to the action of melatonin.
