What is the strongest evidence that scientists use when classifying or changing the classification of an organism into a particular genus group? A. similarity in embryological structures
B. similarity in DNA sequences
C. similarity in femur (thigh bone) lengths
D. similarity in vestigial structures

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

answer: i don't know

explanation:

you need to provide a picture, otherwise i can't tell you.

if you can provide one, i'd be more than happy to you with this!

they absorb it i think

not sure

you

the dark variety, as they are not visible on the dark tree barks

explanation: