Answer:
Answer is D.Produce non-identical genetically different gametes and reduction of chromosomes,creating a haploid gamete.
Explanation:
Meiosis is essential for sexual reproduction.In humans diploid gamete-mother cells or germ line undergo meiosis to produce haploid gametes.
The chromosomes pairs of each parent undergo crossing over during meiosis.so daughter cells i.e gametes have genetic variations.When gametes fuse and form zygote ,its genetic make up is different from both parents.thus meiosis allows a species to bring variations in next generations.Benenficial variations help organisms to adapt to the changes in environment.
Answer: The advancement in the science and technology also comes with some of the risks which needs to be maintained at the time of surgery.
Explanation:
The fluoroscopy involves the use of X-rays, a form of ionizing radiation which increases the chances of radiation induced cancer.
Though this risk depends on the risk length of procedure and intensity of rays.
The higher intensity of the rays can also cause burns on the skin which can be equivalent to the sun burns.
The brightness of the screen is also introduced so that the patient is exposed to less intensity of rays.
Afferent nerve fibers carry signals from the somatic receptors to the posterior horn of the spinal cord or to the brainstem. So i beleive it is 4 but not too sure. Hope this helped a bit (:
Ans c, decreases from bottom to top
