Why couldn't astronomers look for planets before?

Name the following: (a) category of pathogen that causes diseases, like common cold and mumps. (b) the microorganism that requires a host to produce.

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity

If assuming tasting ptc as a simple gene trait,what other genotype would you select to put in this missing genotype box that could result in this phenotype