How many bases are there on each rung of the dna ladder?

Sarah is sitting at the top of the slide in the schools playground. which will increase sarah’s kinetic energy a- an additional child is added to the top of the slide. b- sarah is pushed and moves down the slide. c- sarah climbs down the ladder and off the slide. d- the ladder is moved to the other side of the yard.

What is a group of organisms that are closely related and share similar characteristics

As an asteroid comes close to earth, it's name will change to? apex