Match each description to the type of relationship it represents. tiles *facultative parasitism *obligate parasitism *commensalism *predator and prey pairs *a freshwater amoeba feeds on bacteria in the water. *armillaria fungi grow within a tree's roots, causing the tree to rot, but will survive if the tree dies. *a pseudoscorpion, a type of arthropod, hides under a beetle's wings for protection and transportation, but does not affect the beetle. *rickettsia bacteria can only survive in eukaryotic cells, which are destroyed when the bacteria replicates

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

Considering the yellow and green pea color phenotypes studied by gregor mendel: a. what is the biochemical function of the protein that is specified by the gene responsible for the pea color phenotype? (1 point) b. a null allele of a gene is an allele that does not specify (or encode) any of the biochemical function that the gene normally provides (in other words, either no protein at all or only non-functional protein is produced from it). of the two alleles, y and y, which is more likely to be a null allele? (1 point) c. in terms of the underlying biochemistry, why is the y allele dominant to the y allele? (2 points) d. why are peas that are yy homozygotes green? (1 point) e. the amount of protein produced from a gene is roughly proportional to the number of functional copies of the gene carried by a cell or individual. what do the phenotypes of yy homozygotes, yy heterozygotes, and yy homozygotes tell us about the amount of sgr enzyme needed to produce a yellow color? explain your reasoning. (2 points)

How does a gymnosperm prevent itself from pollinating the same tree