Cellular respiration is the process of releasing energy from the food that one had taken. The reactants of the cellular respiration were both oxygen and glucose. The main product of this process would be ATP (adenosine phosphate) but could also be H2O and CO2.
In biology, a single-access key (also called "sequential key", "analytical key", or "pathway key") is a key where the sequence and structure of identification steps is fixed by the author of the key. At each point in the decision process, multiple alternatives are offered, each leading to a result or a further choice. The alternatives are commonly called "leads", the set of leads at a given point a "couplet". If the entire key consists of exactly two choices at each branching point, the key is called dichotomous, otherwise it is described as polychromous (or, in false analogy, "polychotomous"). The majority of single-access keys are dichotomous.
I<span>t basically helps them define an animal or plant using specific defining characteristics. </span>
Both are extremely similar but have small changes that make all of the difference.
You've probably heard about how our bone structure is similar to many other animals', and likewise about our DNA.
When you observe these small changes, you will find organisms similar to each other where one little thing changes, and then another organism where there's <em>another</em> change, but that first change is also present. You can interpret evolution over different species just by looking at what's different in the bone structure as well as the genes and proteins.
