Answer:
The correct answer is ''METAPHASE I.''
Explanation:
Metaphase I is the stage in which chromosomal studies are generally performed, because its morphology is very clear. The chromosomes, moved by the mitotic spindle, are placed in the center, between the two asters and form the so-called metaphase plate, in which the chromosomes are positioned in such a way that the kinetochore of each sister chromatid are oriented towards the opposite poles. Keeping chromosomes on the cell equator implies a balance between the forces of the microtubules that tend to move the kinetochores toward opposite poles, so positioning them in the center involves a great deal of energy.In each kinetochore, between 20-30 microtubules can be anchored, which exert traction force towards the pole from which they come, so the metaphase plate is maintained by the balance between the opposite forces of the poles on the chromosomes, which hold their sister chromatids by centromeric cohesin.
The correct answer that would complete the given statement above is cerebral cortex. The outermost layer of the brain, the cerebral cortex, is housed in the cerebrum. The cerebral cortex consists of folded gray matter. It is responsible for the interpretation of input from different sources. <span>The </span>cerebral cortex<span> lobes include the parietal, frontal, occipital and temporal lobes.</span>
<span>Mitosis is a part of the cell cycle in which chromosomes in a cell nucleus are separated into two identical sets of chromosomes, each in its own nucleus. In <span>general, mitosis </span></span>
Answer:
(2) exchange food, oxygen, and waste between
mother and fetus
Explanation:
In most mammals like humans, the fetus produced as a result of the fertilization of the sperm and egg, develops in the uterus or womb of the female. However, this developing fetus cannot yet fend for what it requires for survival and is still dependent on the mother e.g nutrients, oxygen etc. How do this substances get to the fetus? Here comes the role of the PLACENTA.
Placenta is an organ in the uterus that serves as a connection between the mother and the fetus in her womb. The placenta enables the mother to pass digested nutrients to the fetus and exchange gases (oxygen and Carbondioxide) between them via the umbilical cord. The placenta also enables the mother remove waste produced by the fetus into her bloodstream.
Answer:
Nitrogen is an important nutrient for all plant cells, and it is component of the chlorophyll found in leaves. Which of the following statements best describes how nitrogen is absorbed and distributed to the leaves of the plant so that photosynthesis can take place?
Nitrogen is absorbed by the roots and distributed upwards through the xylem
Explanation:
Nitrogen are gotten from the ground by the plants before it is transported through xylem to the stem and then the leaves
