What is thought to have caused the extinction of the dinosaurs?

1, Ice ages

2. Increase in oxygen

3. Asteroid that hit Earth

4. Rising sea levels

What is found in the nucleus and contians important information that the cell needs to carry out specific functions? A. DNA B. RNA C. both DNA and RNA D. neither DNA nor RNA

Suppose two scientists perform the same experiment separately, but their results are very different. what could they do to find out why this happened

Which of the following best describes passive transport? O A. Cellular transport in which the cell membrane pinches around a substance in order to bring it into the cell O B. Cellular transport that requires cellular energy in the form of ATP O C.

Which has prokaryotic cells A. rose thorn B. beet root C. Lactobacillus D. human kidney

if a cubical cell with with 2 cm sides doubles the dimensions of its sides what change occurs to the ratio of its surface area to volume

Which of the following is fact based science rather than a part of a personal belief system

If a mother carries a recessive allele for a genetic disorder such as cystic fibrosis under what circumstances will her children inherit the disorder

Explain how compaction is important in the formation of coal

Aristotle was a true scientist

What are the four major ocean basins? Are these basins connected?