Food enters through the mouth, where teeth perform the
initial breakdown of food into smaller particles and mix it with saliva. The
food passes down the pharynx situated behind the mouth and nose, down into the
oesophagus, into the, stomach where further breakdown of food occurs, into the small intestine and
finally into the large intestine.
Answer:d. oogonium, primary oocyte and first polar body, secondary oocyte and second polar body, ootid
Explanation:oogenesis is the production of the female gametes.
In organogenesis,the primordial germ cell first divides by mitosis to produce oogonium.this occurs during the development of a foetus.
The oogonium grows into a primary oocyte,which divides by meiosis to form to unequally sized products,
One of which is the larger secondary oocyte and the other is polar body.
The polar body is smaller and tends to disintergrate.
The secondary oocyte undergoes the second meiosis division and produces a ootid and a polar body, which also disintergrates.
The ootid is the ovum,which is haploid.
<em>Answer:</em>
<em>Yep it is a primary sector</em>
Answer:
The Ti plasmid is used as a vector for the transfer of genes in the plants. They are known to cause the crown gall disease in the plants. They have important economic value.
The transformation of the plant require the removal of tumor inducing gene for the formation of the disarmed pathogen. The gene of interest is kept in between the right and left border of the transfer DNA. This DNA is then introduced in the Agrobacterium. Then, it is cultivated with the target cells like callus so that the DNA can intgrate in the cells. The transformed cells are grown in a particular plants.