Radioactive element ‘C’ decays over time to element ‘D’. Element C has a half-life span of 4 years. If you started with 16 grams of C how many grams of element C would you have after 12 years? 1) 0 grams

2) 1 gram

3) 2 grams

4) 4 grams

5) 6 grams

6) 8 grams

7) 10 grams

8) 12 grams

9) 16 grams

10) 18 grams

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.

c should be the answer

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .