s the Hertzsprung-Russell diagram still a valid instrument in studying stars, given that it is over 100 years old?

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

Which entry is in the wrong position in the table?

Select the correct answer from each drop-down menu. the lac operon in e. coli regulates genes that code for enzymes required for breakdown of lactose. the lac operon is operon that is activated in the presence of .