Modern sea star larvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates.

You have 2 plants of the same type and same size, same amount of leaves. one of them is put inside the house and the other one is put in the balcony. you water them saturday, one plant with 200 ml and the other with 400 ml of water. which one of your plants need less water? explain.

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

The chromosomal structure that limits the number of cell divisions of a cell is the the chromosomal structure that limits the number of cell divisions of a cell is the kinetochore telomere histones centromere