mock paper-

  1. epithelial cell- line body cavities. endothelial cells- line blood vessels. gamates- contain 23 chromosomes and fuse together to produce zygote. nerve cell- recieve and send messages from brain. muscle cell- contract and relax to bring movement to body

  2. similarities- both contain a nucleous, same cell type (gamate), both contain 23 chromosomes. differences- sperm cell has a tail, sperm cell has mitochondrea to provid the cell with energy to move towards the egg cell, sperm cell ha a membrane of digestive enzymes on tip to break down cell membrane an burow inside egg cell.

  3. gass exchange, waste exchange, nutrience, hyrdation, protection

  4. differences- genetics is traits of genes and specific genes and genomics is all genes in a persons body. ?

  5. ?