Which is a strong synthetic polymer that can be used to make toys and bottles? polystyrene foam polyethylene nylon vulcanized rubber

Individuals do not compete directly for resources, but are prey for the same predator

Why do we perceive objects as retaining their brightness under different lighting levels?

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