How is a door hinge like the joint in your knee

How much to pour a 35' vy 50' concrete pad?

Which of the following provides nutrients to a developing embryo, passes wastes into the mother's blood for disposal and forms tissuses of both the mother and the embryo? A.) placenta B.) umbilical cord C.) amniotic or D.) all of the above

How are the reproductive cycles of a fungus and a pteridophyte similar? A.) Both organisms produce haploid spores and exhibit diploid and haploid stages. B.) Both organisms form fruiting bodies that produce diploid seeds. C.

In the three domain system, the domain eukarya consist of all organisms thathave what

The best adapted individuals in a population survive and produce offspring that are likewise well adapted. this is called:

Examples of an atmosphere-cryosphere interaction?

Only scientists use model true or flase

A particular type of living things that can reproduce by interbreeding among themselves is called what?

With 20 amino acids to choose from how many different combinations are there for a protein thats three amino acids long

Which part of a thunderstorm is the most threatening?