Cephalochordates reproduce by releasing their eggs and sperm into the water, where they are fertilized externally. The fertilized eggs develop into free-swimming larvae that drift in the water for up to 200 days, feeding on plankton and other suspended matter, before settling down as adults.
Explanation:
In a process called cellular respiration,chemical energy in food is converted into chemical energy that the cell can use
Cells need "oxygen" for the efficient use of glucose in cellular respiration.
Answer:
The electron
Explanation:
The electron needs to be "excited" or have sufficient amount of energy to take part in reactions for covalent bonding, ionic bonding or metallic bonding.
