Asample of radioactive material has a half life of 20 years and an activity level of 4 curies. after how many years will the activity level of the sample be at 0.25 curie?

Asmall number of finches are removed randomly from the wild and placed in a protected bird area. they are given as much food as they need and have plenty of space. why would natural selection not occur in this population? a. there is no reason for genetic mutation to occur. b. the birds compete for limited resources, c. the population has not reached carrying capacity. d. there is no genetic variation in the finches.

Sweating and breathing is an example of differentiation specialization maintaining homeostasis metabolism

Monitor and apply fix up stratorgies