Which does the letter A represent in the diagram?
centriole
chromosome
centromere
spindle

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

What is the phylum of soft bodied animals with a true bosy cavity and a three part body consisting of a foot visceral mass and a mantle

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?