Answer:
Biotic factor
Explanation:
Competition only exist due to limited resources (abiotic factors AKA environment) which occurs in biotic factors (living organisms).
Fear factor is nonsense because fear does not exist in plants but they still compete for sunlight and water.
Factory factor is nonsense as well because this term does not exist in biology.
3 ..............................
Answer:
a) The half life of the radioactive sample is 0.22 years.
b) It will take 0.16 years to sample to decay to 40% of its original amount.
Explanation:
a) Initial amount of radioactive substance =
Final amount of radioactive substance after 1 year=
Decay constant = k
Decaying of radio active sample follows first order kinetics:
Half life of the sample =
The half life of the radioactive sample is 0.22 years.
b)
Initial amount of radioactive substance =
Final amount of radioactive substance after t years=
Decay constant = k =
Decaying of radio active sample follows first order kinetics:
Solving for t:
t = 0.1587 years ≈ 0.16 years
It will take 0.16 years to sample to decay to 40% of its original amount.