All life on Earth started as unicelluar, prokaryotic organisms. Which of these structures was vital for organisms to develop in order to evolve into more complex, multicellular organisms?

A) nucleus

B) ribosomes

C) cytoplasm

D) cell membrane

The bat-eared fox has 30 chromosomes in its body cells. when the fox's body cells divide by mitosis, how many chromosomes will each daughter cell have

Which of the following is true of both mitosis and meiosis? Both processes produce daughter cells that are genetically identical to the mother cell. Both processes include two rounds of cell division.

Name 2 minerals that can scratch topaz

How do scientists know that the universe is expanding? The Doppler effect shows stars with yellow shifted light The Doppler effect shows stars with green shifted light The Doppler effect shows stars with red shifted light The Doppler effect shows

Which planet has a very active and changing atmosphere

Only problems that are observable, measurable, repeatable, and falsifiable can be proved or disproved using the scientific method.

Sources sometimes present unreliable information as if it were scientific. These claims may be implausible or may not be testable. Which of the following terms describes this type of information? A. Peer review B. Bias C. Empirical evidence D.

What percent of climate change scientist agree that climate warming trends over the past century are very likely due to human activities?

Consider the following data. Rates for Cheetah Population from 2011 to 2012 Cause of change 2011 2012 Deaths 2 1 Births 5 4 Immigration 6 1 Emigration 8 3 Which would have to happen to keep the population growth of cheetahs the same in 2013?

He is kinetic energy moving from a warmer object to a cooler object ... how is this false?