The common ancestors of birds and mammals were very early (stem) reptiles, which almost certainly possessed 3-chambered hearts. Birds and mammals, however, are alike in having 4-chambered hearts. The 4 chambered hearts of birds and mammals are best described as homoplasies.
<h3>
What about homoplasies?</h3>
- It is more frequently a modified version of an inherited characteristic.
- For instance, the scales that were already present in its reptilian parent led to the evolution of feathers in birds.
- Similar to reptiles, mammals developed fur from their predecessors' scales.
- The same set of data can typically yield more than one potential cladogram.
- Different species of legged lizards developed into snakes and lizards with limbless bodies.
- Natural selection does not affect a sizable number of mutations.
- They came to the conclusion that reptiles, birds, and mammals all descended from the same ancient reptilian progenitor.
Learn more about mammals here:
brainly.com/question/5400162
#SPJ4
It should be noted that a cell simply means the basic building block of living things and the human body has million of cells.
<h3>
What Is A Cell?</h3>
Your information is incomplete. Therefore, an overview of cells will be given. Cells provide the structure for the body and take in nutrients that are used to perform specialized functions in the body.
A cell can also be defined as the smallest unit of an organism that has a nucleus. It should be noted that the size of a cell can be measured by using an eyepiece graticule.
Learn more about cells on:
brainly.com/question/3717876
Answer:
B) Smooth ER
Explanation:
mitochondria is the powerhouse of the cell
golgi apparatus is the transportation of the cell
centrioles help with cell division
