Which of the following was not developed until the early part of the twentieth century?

petrifaction

relative time

absolute time

none of the above

In order to survive bacteria need moisture oxygen and what

What is the layer of soil in polar tundra that is always frozen is called

Which statements accurately describe hot spots? Check all that apply. Hot spots can cause volcanoes. Hot spots can cause geothermal activity like geysers and mud pots. The Hawaiian Islands formed over a hot spot.

Where in the Venn diagram would you place the term "seed" when describing plant reproduction?

How are elements and compounds rexlated?

Why the children in a family may have different genotype and phenotype than predicted by the punnet squre

What is meant by the term "chemically gated sodium channel"? Group of answer choices A membrane channel that opens when some chemical binds to it, allowing sodium to cross the cell membrane A membrane channel that opens when sodium binds to it,

Scientists now know how much carbon dioxide was present in the atmosphere as far back as 800,000 years ago. How did they obtain this data?

How do farmers contribute to water pollution?

Which of the following best describes REM sleep?