Answer:
The cell wall is the outermost covering of plant cells. It is present outside the cell membrane and is tough, flexible and sometimes rigid in its texture. It is mainly composed of cellulose, long fibres of carbohydrates including hemicellulose, lignin and pectin.
The main functions of the cell wall are:
Protecting the cell against physical damage and invading pathogens.
Regulates and controls the direction of cell growth.
Providing the strength, structural support and maintaining the shape of the cell.
Functions as a storage unit by storing carbohydrates for use in plant growth, especially in seeds.
It allows entry of smaller molecules through it freely.
Explanation:
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Premature atrial complexes (PAC) dysrhythmia has a cardiac complex that occurs too soon and may have abnormal p waves, but other than being ''early,'' has no other abnormal features.
<h3>What is Cardiology?</h3>
- Cardiology is a field of medicine that deals with problems with the heart and cardiovascular system.
- The term "cardiology" comes from the Ancient Greek words "kardi" (heart) and "-logia" (study).
- Heart failure, valvular heart disease, congenital heart defects, coronary artery disease, and electrophysiology are all covered in the field's spectrum of medical diagnosis and treatment.
- Cardiologists are among the professionals in internal medicine who work in this area.
- Pediatricians that specialize in cardiology are known as pediatric cardiologists.
<h3>Why does cardiac happen?</h3>
- Nearly all heart conditions that are known to exist can result in cardiac arrest.
- The electrical system of a damaged heart malfunctions most frequently during cardiac arrests.
- An aberrant heart rhythm like ventricular tachycardia or ventricular fibrillation is brought on by this defect.
Learn more about cardiac here:
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Many scientists believe that greenhouse gases<span> are directly causing glaciers in all parts of the world to melt and recede at an unprecedented rate.
This is what these scientists believe. If you had any options, it would be best for you to write them down here.</span>
Answer:
first one B second one A
Explanation:
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