They do not produce gametes so they cannot reproduce sexually. They need to reproduce asexually. There are numerous asexual reproduction types. Some include: binary fission and budding
B. Velocity is correct because the truck movement is described with a magnitude and direction and the direction is constant.
A bone injury would most likely heal faster due to the active cells. The cartilage cells tend to stay inactive which makes it to not respond to the injury as immediately.
I think the correct answer would be that all animals have evolutionary relationships. These relationships are found by analyzing or are determined by the genomes, morphological traits, genes, coding of the genes and the like. Hope this answers the question.