[gt.03]a scientist studied the limb structures of three organisms and made their models as shown below.
picture shows the limb of three organisms with similar limb bone structures. all three organisms share common characteristics, most particular in the bones and joints. the first figure has a hand, the second figure has a claw with talons, and the third figure has a hoof; they all have parts that must bend agreeably in order to function properly.
which of these conclusions is most likely correct about the organisms studied by the scientist?
they hunt in a similar way.
they have similar habitats.
they evolved around the same time.
they evolved from the same ancestor.

D. They evolved from the same ancestor.

Explanation:

In the event that at least two species share a one of a kind physical characteristic they may all have acquired this quality from a typical predecessor.

Attributes that are shared because of basic family are homologous structures. For instance, the forelimbs of whales, people, and birds appear to be unique outwardly on the grounds that they're adjusted to work in various conditions.

Nonetheless, on the off chance that you take a gander at the bone structure of the forelimbs, the association of the bones is comparative crosswise over species.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products