Answer:
- Blood travels at a higher velocity in arteries than in veins.
- The volume of blood flow in the arteries and arterioles is greater than the volume of blood flow through the capillaries
- Blood pressure is higher in arteries than in veins.
- The total cross-sectional area of the capillaries is greater than the total cross-sectional area of the venules and veins
Explanation:
The lumen of arteries is larger than that of arterioles and capillaries. However, even though they have a smaller lumen compared to veins, their walls are thicker to bear the pressure of the blood as it is pumped by the heart to the tissues. Therefore the blood pressure and velocity of blood in arteries (that pump blood away from the heart) is higher than in capillaries and veins. Veins take blood back to the heart from tissues hence this blood is under lower pressure and velocity. This is why veins have valves to prevent the back-flow of blood against gravity.
Due to the large cross-section area of capillaries the blood flow is here is slower hence giving time for blood to linger a bit so there is an exchange of materials between the blood plasma and the interstitial fluids that nourish the cells.
False The cell cycle is a repeating series of events that includes growth, DNA synthesis, and cell division
<h3>What is cell cycle ?</h3>
During a cell's growth and division, a set of processes known as a cell cycle occur. In what is known as interphase, a cell spends the majority of its time expanding, replicating its chromosomes, and getting ready to divide. Following the cell's exit from interphase, it goes through mitosis to finish dividing.
- These are the prophase, prometaphase, metaphase, anaphase, and telophase phases. It is sometimes referred to as the sixth phase of mitosis since cytokinesis is the final physical cell division that occurs after telophase.
Learn more about Cell cycle here:
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LOOK AT MY COMMENT SECTION HERE IN THIS QUESTION FOR SOME ANSWERS AND PLS MARK BRAINLY!!!
Correct answer - Replace Thymine (T) with uracil (U) in the DNA molecule.
Why? - As the RNA polymerase continues down the strand of DNA, more nucleotides are added to the mRNA, thereby forming a progressively longer chain of nucleotides. This process is called elongation. DNA (top) includes thymine (red); in RNA (bottom), thymine is replaced with uracil (yellow).
