If the half-life of a radioactive isotope is 5,000 years, how many grams of the radioactive isotope in a specimen will be left after 10,000 years if you start off with 100 grams of the radioactive isotope?

Explain why you automatically blink when something is coming at your face.

How are prokaryotes and eukaryotes different? Prokaryotes have DNA, but eukaryotes do not. Eukaryotes have DNA, but prokaryotes do not. Prokaryotes have nuclear membranes, but eukaryotes do not.

Which group of animals has existed the longest? a. tubulidentates b. perissodactyls c. artiodactyls d. sirenians

When dealing with chemicals in the laboratory, which of the following is not safe? checking labels on any chemical containers washing your hands after working with chemicals directly smelling any chemicals avoiding skin contact with chemicals

Orchids were studied to determine if the amount of humidity affected the flowering of these plants. Which of these was the independent variable in this study?

What happens to a carbon atom transitioning between photosynthesis and respiration?

Which environment change is likely to allow the most individuals to survive A. Transition from a meadow to a forest B. Massive volcanic eruption C. Oil spill in the bay D. Acres - wide forest fire

In 2015, the United States was found to be discriminating against Mexcian-caught tuna by informing consumers of the fishing practices used to catch the tuna. Which organization made this ruling? A. The Ramsar Convention. B.

Non-segmentation allows for evolution any innovation in body form true or false

Why do plants have a greater disadvantage in unpredictable environments than animals?