The organization of living organisms starts with which level?

Which relation is incorrect?

The largest number of chloroplasts is found in

$A$ point object is placed at a distance of $10\,cm$ and its real image is formed at a distance of $20\,cm$ from a concave mirror. If the object is moved by $0.1\,cm$ towards the mirror,the image will shift by about:

The product of the lengths of the perpendiculars from any point on the hyperbola $x^2 - y^2 = 8$ to its asymptotes is:

Which of the following pairs of elements cannot form an alloy?