Why it is better to use a broad-spectrum sunscreen

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.

I’m stuck on this question cuz i’m stupid sksksksk

Urgent. the table shows the relative blood flow through some organs in the human body that is, the percentage of blood that flows through a given organ, through which organ(s) does all the blood flow? explain the effect of exercise on blood flow to skeletal muscles.