The right answer is notochord.
La chorde (ou notochorde), issue du mésoderme axial, est une structure embryologique cartilagineuse, spécifique de l'embranchement des Chordés (Chordata), auquel appartiennent notamment les Vertébrés (Vertebrata).
Elle constitue une sorte de baguette rigide mais flexible, formée de grandes cellules et située dorsalement entre le tube neural et le tube digestif. Elle est également un important centre de signalisation, produisant notamment la protéine Shh qui permet la formation du sclérotome à partir des somites ou « mésoblaste dorsal » (et donc les vertèbres) et la mise en place de l'axe dorso-ventral du tube neural.
La chorde est entourée de somites qui sont pleins et métamérisés.
Natural selection is the primary process that drives Darwin's theory of evolution, the correct option is a.
Darwin's theory of evolution is primarily driven by the process of natural selection. Natural selection is the mechanism by which certain heritable traits become more or less common in a population over successive generations. It occurs due to the differential reproductive success of individuals with advantageous traits that are better suited to their environment. Individuals with beneficial traits are more likely to survive and reproduce, passing on their advantageous traits to their offspring.
Over time, this leads to the accumulation of favorable traits within a population, while less advantageous traits become less prevalent. Natural selection is driven by various factors, including environmental pressures, competition for resources, and adaptation to changing conditions. It is a key driving force behind the diversity and adaptation of species observed in the natural world, the correct option is a.
To learn more about evolution follow the link:
#SPJ6
The complete question is:
Which process drives Darwin’s theory of evolution?
a. Natural selection
b. Genetic drift
c. Lamarckism
d. Mutation
B. gravitational, weak nuclear, electromagnetism, strong nuclear.
C. strong nuclear, electromagnetism, gravitational, weak nuclear
D. weak nuclear, gravitational, strong nuclear, electromagnetism
pituitary gland is the answer
Answer:
Select an entire table using a keyboard. To select an entire table using a keyboard, position the cursor in the first cell of the table. Press Alt + Shift + End on your keyboard to select to the end of the first row and then press Alt + Shift + Page Down to select to the last cell.
The given statement is False
Strobe lighting is far better than continuous lightning. This is a kind of flash that appears while clicking pictures and the flash disappears once the picture is clicked. There is no hot spot created in this kind of lightening. There is no heat generated during strobe photography which makes the individual comfortable for a longer shoot. The quality of pictures is very high and every part of the picture is seen clearly and precisely.
B.acquired characteristics
C.natural selection
D.radiometric dating