Given the age of the meteorite is 4.5 billion years old with 78 atoms of lead-206 the answer should be B. 156. The half-life of uranium-238 in order to decay into lead-206 is 4.46 billion years, which means that the original number of atoms is 156.
I believe the answer is true because we spill liquids during these events causing more erosion
A hypothesis can become A. a scientific theory if it is supported by repeated experimentation.
Answer:
In grassland ecosystem, first trophic level is the producer. Producers are the organisms which makes their own food, here the producer are grasses. The second trohic level contain herbivores which feed on these grasses. These herbivores are eaten by secondary consumers which belongs to third trophic level and secondary consumers are then eaten by tertiary consumer.
The population of producers are very high so it is placed at the base while tertiary consumer are placed on the top due to low population.
Answer:
4
Explanation:
If both parents were Hetero brown, they would both have this allele: Bb.
If you were to draw a punnet square, the outcomes would be: BB, Bb, Bb, and bb.
There would be a 75% chance of the offspring having brown eyes and a 25% chance of the offspring having blue eyes.
