Answer:
C - Contains the embryonic disk
Explanation:
After an egg is fertilized, it begins to divide into smaller cells, from the 1 cell stage, to 2, to 4 and so on. Then, on the third day, the cells fall within 16-200 cells and it is then called a <em>morula</em>.
On the fifth day, the morula becomes a ball of calls which is now differentiated into an <em>inner cell mass and a trophectoderm</em>. The inner cell mass becomes the <em>embryo</em> as development goes on and the trophectoderm, becomes the <em>placenta</em>.
As development goes on further, the floor of the amniotic cavity is formed by the embryonic disk, a layer of prismatic cells derived from the inner cell mass.
The embryonic disc develops into 3 layers:
There is a major differentiation of cells which gives a template for the origin of development of specific organs of the embryo.
Answer: R = 2 ohm
Explanation: Based on the Ohm's law
U = R*I ---> R = U / I
R = 10 / 5
R = 2 ohm
Answer:
Cells with similar structures and a common purpose that are organized form a tissue (option D).
Explanation:
Biological tissues are structures originated by the grouping of differentiated cells, which are organized and distributed in such a way that they can fulfill a function in a coordinated way. A characteristic of tissues is that all the cells that constitute them have the same embryonic origin.
An example of a tissue is nervous tissue, formed by neurons, specialized cells that when united form it and fulfill the same function.
The functions of cells are mainly multiplication, development and differentiation, in addition to their ability to group together to form tissues.
The other options are not correct because:
<em>A. </em><u><em>Organs</em></u><em> are formed from differentiated tissue.</em>
<em> B and C. </em><em><u>Digestion and circulation</u></em><em> are functions that depend on the organs of the digestive and circulatory systems, respectively.</em>