A The continents were once joined together
Explanation:
All the continents were once together making a huge one called Pangea.
Answer:
(a) Allow movement in only one plane/direction (that is extension or flexion)
(b) The skeletal system also produces blood cells in their bone marrow
Yes. Knowing which nucleotide base codon the amino acids is made of, you can "decode" amino acids to the original DNA sequence.
The answer is letter B.
<span>
Viruses have the ability to reproduce on their own and
sometimes within hosts. It is an infectious agent that can affect all types of
life forms (e.g. animals, plants, microorganisms). They are found in almost
every ecosystem on Earth and they are the most abundant type of biological
identity. Asvirology is the study of
viruses which is a sub-specialty of microbiology. The spread in many ways and
can be transmitted from one organism to another or sometimes to multiple
organisms at the same time. Its origins in the evolutionary history of life is
still unclear but they are considered to be life forms because of their
capacity to carry genetic material, reproduce, and evolve through natural
selection. </span>
