Biotic factors are the living things in any environment, while abiotic factors are the nonliving things.
So, in the Sahara desert the living things (biotic factors) would be the animals and plants.
The nonliving things (abiotic factors) would be the sunlight, temperature, dirt, etc.
During the metaphase, chromosomes are taken to the equatorial plane, were they randomly line up. Option B. Mitotic spindle attaches to the chromosome's centromeres and lines them up in the middle of the cell.
<h3>What is the metaphase?</h3>
Metaphase is one of the cell division stages that follows the prophase and precedes the anaphase.
During this phase, chromosomes are taken toward the center of the cell by the spindle apparatus. Once in the equatorial plane, chromosomes randomly line up.
Once aligned, each chromatid joins with a microtubule of opposites poles and gets ready to go through the anaphase. Sister chromatids are held together until they reach the Anaphase.
Since chromosomes in this stage are well defined and can be observed in detail under the microscope, they are used to create karyotypes and identify chromosomal abnormalities.
These chromosomes have the typical X shape.
Among the options, the one that correctly describes the metaphase is Option is B. Mitotic spindle attaches to the chromosome's centromeres and lines them up in the middle of the cell.
You can learn more about the metaphase at
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Answer:
The correct answer will be option-D.
Explanation:
The HCl secreted from the stomach makes the food or chyme acidic which can harm the digestive organs like small intestine.
So to protect the small intestine from the acidic nature of the chyme, the chyme enters the duodenum through pyloric sphincter which controls the movement of chyme to intestine and allows the slow movement of chyme,.
The pancreatic juice released from the pancreas contains enzymes and bicarbonates which neutralizes the action of HCl and hence prevent the small intestine.
Thus, option-D is the correct answer.
Answer:
Genotypes:
BB, Bb, bb
Phenotypes:
Brown eyes, hazel eyes
Explanation:
Punnet squares are in the image attached
