Explanation

Explanation

The enzyme that synthesizes DNA,

DNA polymerase can only add nucleotides to an already existing strand or primer of DNA or RNA that is base paired with the template.

ND5-07-2023

Explanation

A nucleotide, the basic unit of DNA, consists of a 5-carbon sugar (deoxyribose), a nitrogenous base, and a phosphate group.

These components link together to form the DNA's double-helix structure.

Explanation

An invertebrate is an animal without a backbone.

Worms, like earthworms, are classified as invertebrates.

They lack a backbone and are found in various environments. 

Explanation

Explanation

Explanation

Centrioles play a crucial role in organizing the spindle fibers during cell division, specifically in mitosis and meiosis.

They help in the formation of the spindle apparatus, ensuring proper chromosome separation.

Explanation

Explanation

• Water vascular system in echinoderms used for Respiration
• ***
• The Water Vascular system in echinoderms is also used for locomotion, food, and waste transportation.
• The water vascular system helps in respiration, as the gaseous exchange takes place on the thin wall of feet tubes.
• The system consists of a central ring canal and radial canals extending along each arm
  

Explanation

Magnetic lines of force always form closed loops from the north pole to the south pole outside the magnet and continue inside the magnet.

They never start or end abruptly like electric field lines.