1. What are strata? 2. Where are the oldest fossils based on Steno’s ideas?

3. Geologists were unable to compare rocks from one location to another. William Smith figured out how to match the ages of layers of rock by comparing within the layers.

b because they naturally adapt to their environment plz mark brainliest

explanation:

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

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