When does a seed become a seedling? A. When it has roots

B. When a flower forms

C. When photosynthesis begins

D. When a stem forms

As a small change in a person's dna can cause a genetic disorder

How does deforestation affect the water cycle? a. it increases the amount of runoff b.it increases the amount of percolation c. it increases the amount of transpiration d. it increases the amount of precipitationa it increases the amount of runoff

How many chromosomes does each human cell contain? a. 23 chromosomes b. 26 chromosomes c. 43 chromosomes d. 46 chromosomes