They provide evidence of genes coding for structures that are present not because they are useful, but because they were once useful to an ancestor.
<span>One example is the plantaris muscle. This is a long, thin muscle in the human foot and calf that serves no significanl purpose in humans ... in fact, it is regularly removed by doctors harvesting muscle tissue to use in reconstructive heart surgery, because its removal leaves no loss of function in walking or balance. </span>
<span>However this same muscle is found more fully developed in the feet and calves of other primates. It is the muscle used for grasping with the feet.</span>
The people represented by the ends of the bell-curve are the most rare.
This could mean that if it's an iq curve the people at the ends have either a really high or really low iq etc.
The answer is tracheophyte.
Tracheophytes are also know as higher plants or vascular plants. It is a form of a large group of plants. These plants are defined as land plants. It has lignified tissues for conducting minerals and water to the plant.
The mitochondria breaks down food into molecules the cell can use.
Answer:
Chemical Mixtures
A mixture is a material system made up of two or more different substances, which are mixed but not combined chemically. A mixture refers to the physical combination of two or more substances in which the identities of the individual substances are retained.
Explanation:
hope it helps : )
