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:
<u>Option-(True):</u> The following statement is true in all sense, as the "Cytotoxic T cells and NK cells kill by secretion of proteins. The first called granzyme which forms complexes that penetrate the cell membrane and allows the passage of the apoptosis inducing protein perforin to enter the targeted cell."
Explanation:
- In order to make it more difficult for the pathogens and other foreign particles to stay inside the human body, the defense mechanism of the human body system has evolved itself to great extents as there are different level of immune layers and more over cells that either helps in the recognition of these anti-bodies or attacks them to be eliminated from the given system.
- As the hazardous or cancer cells which are not required to stay inside the human body is removed with the help of these lymphocytes inside the immune system of the human body.
Answer:
FIRST ONE
Explanation:
add energy in the form of heat to get the change in the state of matter.
Answer:
The correct option is : a. Acanthamoeba keratitis
Explanation:
Acanthamoeba keratitis is the infection of the cornea of the eye. This infection is caused by the protozoa Acanthamoeba and can lead to permanent blindness. This disease is very difficult to treat by using conventional medications.
The common medication used in the treatment of this infection is a combination of polyhexamethylene biguanide (0.02% to 0.06% drops) and chlorhexidine (0.02 to 0.2% drops).
