Cephlochordates have a backbone that extends from their tail to where? their gills their anus their heart their head

What are two distinguishing features of RNA? a) RNA forms a double helix of reverse complementary strands. b) RNA contains phophodiester bonds as part of its sugar backbone. c) RNA contains a methylated form of thymine.

What leads to a hypothesis? What comes after?

Which of the following best represents a simple food chain? A. Producer - secondary consumer primary consumer B. Primary consumer - secondary consumer → producer C. Secondary consumer → primary consumer → producer D.

Rocks are formed by changes in heat and pressure of hot, watery fluids

Which part of the earth system contains the air we breathe? Atmosphere Lithosphere Hydrosphere Magnetosphere

What is the backbone of DNA made of? sugar and phosphates nitrogenous bases and sugar nitrogenous bases, sugar, and phosphates a polymer of nitrogenous bases

What is the site of the light-dependent reactions? a thylakoid membrane of the chloroplasts b stroma of the chloroplasts c cristae of the mitochondria d stroma of the mitochondria?

Which of the following shows a reproduction of chromosomes by half?

El nombre de 10 animales y 10 plantas usando las normas de Carlos linneo

How might cancer stem cells originate?