Answer: Meselson & Stahl reasoned that these experiments showed that DNA replication was semi-conservative: the DNA strands separate and each makes a copy of itself, so that each daughter molecule comprises one "old" and one "new" strand. The semi-conservative model, in which each strand of DNA serves as a template to make a new, complementary strand, seemed most likely based on DNA's structure. ... From the patterns of DNA labeling they saw, Meselson and Stahl confirmed that DNA is replicated semi-conservatively.
Explanation:
They involve matter and energy
Evidence supporting the Big Bang theory includes the presence of cosmic microwave background radiation, visual observation of redshifted objects and the abundance of primordial elements found throughout the universe.
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.
