The region of the root that provides protection to the growing tip is the:
A. Elongation zone
B. Meristematic zone
C. Maturation zone
D. Root cap
Answer: Option D
Solution (By JKExamLibrary)
The root cap is a thimble-like mass of parenchyma cells covering the apical meristem, protecting it as the root pushes through the soil. It also secretes mucilage to ease passage. Cells are constantly sloughed off and replaced. The meristematic zone is where cells divide.
Explanation:
Hemophilia A is an X-linked recessive bleeding disorder caused by deficiency of factor VIII. Hemophilia B is factor IX deficiency. Anemia is low RBCs, thalassemia abnormal hemoglobin, leukemia cancer of WBCs.
Explanation:
Vas deferens transports sperm. The ovum is released from the ovary, fertilization occurs in the fallopian tube, prostate produces seminal fluid.
Explanation:
Agarose gel electrophoresis separates DNA fragments by size as they move through the gel under an electric field; smaller fragments migrate faster. DNA is stained with ethidium bromide and visualized under UV light. PCR amplifies DNA, centrifugation separates by density, microscopy provides magnified images. Gel electrophoresis is essential in molecular biology and forensics.
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