Sperm cells are to enable them to egg cells. To do this they need to travel long distances - relative to their size - to reach the , then break through to the and fertilise it (combine the sperm DNA with the egg DNA).

Which best explains why there are 64 possible codons in the genetic code and only 20 amino acids that make protiens of living organisms on earth

Name the types of burns one can get and which structures of the integument are damaged

Lola needs to sign 6 invitations. using stopwatch that measures time to tenths of a second, it takes lola 5.3 seconds to sign her full name. going by the accuracy of the stopwatch, which is the most accurate determination for the number of minutes lola needs to sign all 96 invitations