Why do you think epiphytes attach themselves to other trees

How does pregnancy begin? a) a placenta forms in the uterus b) a sperm reaches an egg in the fallopian tubec) the blastocyst differentiates into two cell types d) contractions begin in the uterine wallapex

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

The structure that houses the cells genetic information.