A black hole is the fate of

a red giant

small star

a very massive star

an average-sized star

The scientist removed all of the mitochondria from hundreds of these cells. All of the cells died. Explain the most likely reason the green algae could not survive without mitochondria.

A child having a tantrum in a department store screams louder the more upset his parent gets. This is an example of A) Negative Feedback B) Positive Feedback C) Survival of the fittest D) Dynamic equilibrium

What do Inducers cause cells to do?

Biology students are examining the diagram below, which shows four vertebrate embryos at the same stage of development. The students are asked, how do the embryos provide evidence for

Stentor is classified in the kingdom Protista. What features, both internal and external, should be considered, when classifying this organism

If earth tides decreased what would be the most likely explanation?

We have all seen the moon shining at night, whether it is a small sliver or a large full moon. What causes the moon to shine the way it does? A) The tilt of the Earth on its axis. B) The rotation of the Earth on its axis.

what can you infer about how cell division in a normal cell compares to cell division in cancerous cells?

Whats difference between statements and questions?

Which of the following statements is true? Electrons have a negative charge. The n=1 shell can hold eight electrons. The number of electrons in an atom is equal to the number of neutrons. The second electron shell can hold 16 electrons.