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.
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The feature of the image formed by a plane mirror is right side up.
The correct option is D.
<h3>What is an image formed by a plane mirror?</h3>
A plane mirror has a flat and reflective surface.
If a light strike on plane mirror, the angle of reflection is equal to the angle of incident.
A plane mirror's image is virtual, erect, and the same size as the item.
It gives the impression that the object and its image are equidistant from the mirror.
Thus, the correct option is D. right side up.
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<h2>Answer:</h2>
<u>The pituitary gland is called the master gland of the human body. </u>
<h2>Explanation:</h2>
The pituitary gland is called the master gland of the endocrine system present in the human body because this gland controls all the functions of many endocrine glands. The pituitary gland is no bigger than a pea, and is located at the base of the brain which hangs by a thin stalk from the hypothalamus.
The answer is
Alzheimer's disease. The most feared psychological problem among the elderly is
Alzheimer's
disease. Alzheimer's is named for the
first person to identify the disease. It
is a brain disease while stroke is a brain injury, less than 5% is likely to be
suffering some form of dementia.
One of the possible answers is sickle cell.
