Why does the heart start pumping blood to all the cells so early in pig/human development

Red litmus paper is dipped into a solution and stays red. Blue litmus paper is dipped into a solution and stays blue. Why did this happen?

A strand of DNA serves as a model of the synthesis of RNA molecules. is this true or false?

Which of the following statements describes how matter moves through the biosphere? T] matter moves in one-way flow G] matter moves from animals to plants Y] matter recycles and moves in a continuous cycle S] matter is destroyed after it moves to

Organisms in the domain Eukarya are classified by which physical feature? lack of a cell wall cells that do not contain a nucleus cells that contain a nucleus

Which of the following statements is true? A) Viruses are bigger than bacteria. B) Viruses conduct cellular respiration like any other living organism. C) Viruses have both RNA and DNA.

A particular tissue was discovered to have cells that lie in small chambers, separated by a matrix that is solid yet flexible, and fibers that could be stretched while still being able to return to their original length. Name this tissue.

What does the lac operon in bacteria code for?

Egg and sperm are a type of these?

What is Chemical digestion?

Where would sugar most likely be present in water?