40 points plzzz ! radium has a half-life of 1600 years. how much radium will be left from a 1000-gram sample after 1600 years?

Ending Amount = Beginning amount / 2^1

Ending Amount = 1,000 / 2

Ending Amount = 500 grams

Step-by-step explanation:

  the correct choice is marked

step-by-step explanation:

the first two graphs show multiple turning points. the last graphs matches the description in every detail.

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.