Answer:
A. These homologous structures indicate that these four organisms all share a common ancestor.
Explanation:
Homologous structures mean the organs will have similar structure, but not necessarily function (human arm vs whale's flipper). While analogous structures are similar in function but not structure (wings of an airplane vs wings of a bird). Since the question states that they are similar in skeletal structure, we know they must be homologous structures, thereby eliminating B and C. D is not a choice because the question does not provide anything about the order of evolution. Therefore the answer is A. These homologous structures indicate that these four organisms all share a common ancestor.
Since Matt has never taken piano lessons but plays like a professional pianist, everyone assumes he acquired the skill through osmosis.
An identical twin I think
Answer:
SI system consist of standard units of measurement that are defined by International System Of Units.
Explanation:
SI stands for Standard International. It consist of total 7 units that are accepted internationally,
Two advantages of SI units are:
- SI unit is rational system of units, that means one unit denotes one physical quantity.
- SI units are internationally accepted which makes researchers and scientist calculations
The right option is d. Orthostatic
hypotension
Orthostatic hypotension is a form
of low blood pressure that occurs on standing up from sitting or lying down. It
is caused as a result of blood loss, dehydration or aneamia. The most common
symptom of orthostatic hypotension is lightheadedness or dizziness which usually
last less than a few minutes.
