How can you explain that the fact that fish, penguins, and dolphins all have the same basic shape?

How do you date a sample of rock that you suspect as being one of the earliest on earth

In tomato plants, mendel found that the allele for smooth seeds (s) is dominant, while the allele for wrinkled seeds (s) is recessive. which of these punnett squares shows crosses between two plants heterozygous for smooth seeds? i need this to be answered as soon as ! sry the picture is bad quality

If your blood becomes too concentrated with iona, what will happen to the red blood cells