Question 6 Modern whales lack hind limbs and have tail flukes and ears specialized for hearing underwater. Which of the
following is the correct order for the evolution of these whale characteristics?
Loss of hind limbs followed by tail flukes and underwater ears
Loss of hind limbs followed by underwater ears and tail flukes
Tail flukes followed by loss of hind limbs and underwater ears
Underwater ears followed by tail flukes and loss of hind limbs

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

the index of refraction of the second medium is higher. i just took the test trust me !

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.