Radium has a half-life of 1,620 years. How many years will a 1 kg sample of radium decay and reduce to 0.125 kg of radium?

A. 1,620 years

B. 3,240 years

C. 4,860 years

D. 6,480 years

1. a host loses nutrients to a parasite

2. a parasite only benefits when the host is alive (cause if the host dies the parasite dies with it )

3. producers to consumers

4. the tapeworm is a parasite

5. they convert energy from the sun (photosynthesis)

6. sunflower-robin (i think im 80% sure)

7. producer

8. consumer

9. prey

10. fresh water snails ( cause the green algea is the producer and the snails are the primary consumers and the small fish consumer so is the big fish)

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.

hello

answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this