If steel is more dense than lake water, why can a boat float?

Which type of organism is missing from the food web seen in the illustration? primary consumers decomposers primary producers secondary consumers

How do all types of diffusion/passive transport actually ‘work’ without using even the smallest amount of cellular energy?

The diagram shows the results when two parents are crossed. the letters represent alleles for a trait that is controlled by three different genes. which best describes this inheritance pattern? multiple allele because a trait is controlled by three different genes polygenic because the offspring have alleles from both parents multiple allele because the offspring have alleles from both parents polygenic because a trait is controlled by three different genes