A scientist is studying the structural adaptations that occurred in a particular horse species over time. For several generations, the
horses tended to have smaller teeth and longer toes. Then, there was a shift in the fossil record, and the horses tended to have
larger teeth and shorter toes. What is the most likely cause for this shift in the horses' anatomy?
A.
The horses began to eat meat instead of plants.

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h,o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.

Identify the composition of oceanic and continental crystal rocks.in a model of earth’s interior,where would these rocks appear?

In sweet pea, gene c is responsible for color production and gene p is responsible for the purple color pigment. both of them are located on two different loci on different chromosomes. the flowers will be purple only when the plant has the genotypes as c_p_. no color will be produced with genotypes: ccpp, ccpp, ccpp, ccpp. thus, gene c controls the expression of gene p. what pattern of inheritance is exhibited here? a. pleiotropy b. epistasis c. multiple alleles