How to get long and strong nails?

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

Drag each label to the correct location on the image. g organisms adopt different strategies and structures to make sure their offspring it uses. herds young into center of group produces many offspring at once to protect against high predation risk protects offspring until environmental conditions are ideal for growth coo b 13 1994 7 odos si . an . i

When does dna replication(make a copy of itself)?