Answer:
B
Explanation:
An undifferentiated cell is such as that in a blastocyte. They are multipotent and can differentiate into any type of cells. The cells of the mass begin to have their gene differentially expressed (due to differential silencing of particular genes) hence the cell become determined. They become well organized into tissue such as skin and other organs.
Answer:
c and d
Explanation:
<u>A species of an organism with cell wall that lacks peptidoglycan is definitely not a bacterium because bacterial cell walls usually have peptidoglycan.</u>
One particular group of organisms whose cells have cell walls but lack peptidoglycan is Archaea.
<em>Archaea represents a group of prokaryotes that are able to survive in extreme conditions such as high temperature, pressure and salinity. As such, they could inhabit hydrothermal springs as well as alkaline hot springs.</em>
Hence, thermoacidophile <em>Sulfolobus acidocaldarius </em>is likely to be an Archaea and could inhabit both hydrothermal springs and alkaline hot springs.
The correct option is option c and d.
Answer:
The correct answer is B.
Explanation:
Given the baltimore's scheme which used for virus classifications, the most closely related option of virus to the described polio virus with a single stranded RNA in the question would be retroviruses that require a DNA intermediate.
Because much like the single-stranded RNA viruses, the retroviruses do not contain any DNA but they do have an enzyme named reverse transcriptase which they can use to replicate their RNA into the host cells DNA and use the end product for their benefits. So they both work in similar ways.
I hope this answer helps.
