Your answer to the question is true
1. The dominant trait is yellow peas, whereas the recessive trait is green peas.
Let yellow peas be YY and green peas be Yy
2. the genotype of the parents are YY and Yy.
3. The punnett squares contain the first set of peas and second set.
4. You can see that in the second crossbreed, the different coloured square represents what will become green peas. Thus the ratio would be 3:1.
Either the Porifera (sponges) or the Ctenophores (comb jellies). The jury is still out on which group branched off the main animal line first.
Your answer is b Changes in the tempurature and salinity of water