Are there any organisms that might never or very rarely be fossilized?

Complete the possible outcomes for each generation in the pedigree chartaa aa aa

Based on the diagram, which of the following best describes ways in which the physical appearance of h. neandertalensis and h. sapiens differ?

The greater an ecosystem's the more likely it is that some organisms could survive catastrophic environmental changes. a. species diversity b. producer population c. water availability d. carrying capacity