The precambrian era makes up about 90% of the earths history, but there was little to no living organisms at the time other than microscopic ones. The first eukaryotes were found in the cambrian period after the precambrian period, not only that but at the end of the precambrian era in the Proterozoic era there was a mass extinction of about 70-80% of all living organisms
Here's a graph showing the stages.
Look closely at the second stage-- the death rate is low but the birth rate is high.
It's <span>
D. The death rate begins to fall, but birth rates remain high for a time.</span>
Living things are identifiable by:
- movement (even cellular or internal movement)
- growth and development
- response to stimuli
- reproduction
- use of energy
- cellular structure
The probability that a homozygous recessive individual would be producing a dominant allele would be 0%. If expressed as a percentage, this is because the individual does not even have the possible allele in its genotype for whatever trait or feature that the protein codes for.
