Hereditary and Evolution and Light Worksheet

                                                   Hereditary and Evolution

(Q.1)  Which contributed to the success of Mendel?

(a)Qualitative analysis of data
(b) Observation of distinct inherited traits
(c) His knowledge of biology
(d) Consideration of one character at a time

(Q.2)  Phenotypic trait is

(a) The visible characteristics of an organism
(b) The genetic constitution of an individual
(c) Gene ratio between individuals
(d) Form the basis of inheritance

(Q.3)  Dominant trait is one that:

(a) decides fate of organism in a population.
(b) is expressed in first filial generation.
(c) appears in the proportion of 1/4 in second filial generation.
(d) qualifies an organism to be the primary consumer.

(Q.4)  Mendel had perform his studies on

(a) garden Pea
(b) chick pea
(c) cow pea
(d) beans

(Q.5)  Mendelian laws apply only when-

(a) The parents are pure breeding
(b) The characters are linked
(c) One pair of contrasting character is dependent upon other pair
(d) F1 in a monohybrid cross shows two types of individuals

(Q.6)  Sex chromosomes may be defined as-

(a) Z-chromosomes
(b) G-chromosomes
(c) D-chromosomes
(d) X-chromosomes

Light

(Q.1)  Magnification produced by a concave mirror is

(a) Negative for a real image and Positive for a virtual image
(b) Only positive
(c) It produces no magnification
(d) Only negative

(Q.2)  Radius of curvature of a spherical mirror (or lens) is

(a) Half of its focal length
(b) Double of its focal length
(c) Equal to its focal length
(d) There is no relation

(Q.3)   A doctor has prescribed a corrective lens of power + 1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging?

(Q.4)  What is the difference between real and virtual images?

(Q.5)   An object is placed at a distance of 10cm from a convex mirror of focal length 15 cm. Find the position and nature of the image.

(Q.6) Why do we  prefer convex mirror as a rear view mirror in vehicles?

(Q7). A convex lens forms a real and inverted image of a needle at a distance of 50 cm from it. Where is the needle placed in front of the convex lens if the image is equal to the size of object. Also find the  power of the lens?