What is a radical?

a group of atoms that give off radiation

a group of atoms that act like one atom

a group of ions that have no charge

a group of ions that break up during a reaction

If the Oort cloud contains 1012 comets, and ten new comets are discovered coming close to the Sun each year, what percentage of the comets have been "used up" since the beginning of the solar system?

Imagine this scenario in the not too distant future. You know your own genome, and it reveals that you have a genetic recessive gene for a deadly genetic disease (you are a 'carrier' but do not have the disease) and your spouse has the same

The cheetah is the fastest land animal accelerating from 0 to 100 km per hour in hour many seconds? 1) 2 seconds 2) 3 seconds 3) 5 seconds 4) 7seconds

Which of the following is NOT a main characteristic that scientists focus on when determining which kingdom an organism belongs to? cell type body type nutrition none of the above

Which gas is excreted as a waste product of autotrophic nutrition in maple trees?

Rosa has a vegetable garden. She places earthworms, which are decomposers, in the garden soil. What is Rosa most likely trying to do? A. prevent insects from eating the plants B. create usable food energy for the plants C.

A transposable element (TE), or transposon, is a __ sequence that can change its __ within a genome, sometimes creating or reversing mutations and altering the cell's __.

How a biologist's reseach can proceed from an idea to a published article

How many times do the nostrils of a frog open and close in one minute

What regulates the enzymes present in an organism A. Phenotype B. Genotype C. Proteins D. Carbohydrates