The medical condition where the lens of the eye becomes opaque is:
A. Astigmatism
B. Glaucoma
C. Cataract
D. Myopia
Answer: Option C
Solution (By JKExamLibrary)
Cataract is clouding of the crystalline lens, causing blurred vision and eventual blindness if untreated. It is often age-related or due to UV exposure. Myopia is nearsightedness, glaucoma optic nerve damage, astigmatism irregular curvature. Cataract is treated by surgical removal and lens replacement.
Explanation:
Prophase is the first stage of mitosis where chromatin condenses into visible chromosomes, the nucleolus fades, and the mitotic spindle begins to form. In metaphase chromosomes align, in telophase they decondense and the nucleolus reappears. Interphase is not a mitotic phase.
Explanation:
Stem bears leaves and reproductive structures. It is positively phototropic (grows towards light). Leaves are the main photosynthetic organs. Roots grow downward.
Explanation:
The first heart sound 'lub' is caused by the closure of the atrioventricular valves (mitral and tricuspid) at the beginning of ventricular systole. The second sound 'dub' is due to closure of semilunar valves (aortic and pulmonary) at the end of systole. Abnormal sounds (murmurs) indicate valve defects. This is due to turbulence, but the sound specifically is produced by valve closure.
No comments yet. Be the first to start the discussion!