Zirconium has an atomic number of 40 and an atomic mass of 91. How many neutrons does it have?

Cells that have only half of that number are called

Early amino acids may have originated a Deep in the crust b At hydrothermal vents C Elsewhere in the solar system d All of these

For each statement below, indicate if it is TRUE or FALSE and explain why. (a) All highly conserved stretches of DNA in the genome are transcribed into RNA.

A mutation can be passed on to offspring if it occurs in the

Where are large exoplanets located?

Which scientist disproved the ideas of spontaneous generation

Many fault lines are obvious at the surface. How can the epicenter of an earthquake be located miles away from the fault line?

The harmless scarlet kingsnake has scales in a coloration and pattern resembling the scales of the dangerous coral snake. The scarlet kingsnake is using to avoid predation

Charles Darwin came up with the system we use to name and classify organisms. True False

8. Cystic fibrosis is caused by a recessive allele. The frequency of this allele is 0.1 in a population of 2,500. a. What is the frequency of the dominant allele? b. How many people in this population will have cystic fibrosis? c.