Science Fill in the blank

Radius of curvature of a spherical mirror is always _______ its focal length.(half of, three times, twice)

Incident ray, normal drawn at the point of incidence and reflected ray lie in _______ plane / planes.(one, two, three)

Complete image of a distant object can be seen using _______ mirror.(concave, convex, plane)

Complete image of a distant object can be seen using _______ mirror (concave, convex, plane)

Image obtained by plane mirror is always _______ . (virtual and erect, virtual and inverted, real and erect)

Selection of ............ by environmental factors forms the basis for evolutionary processes. (variants, species, types)

The idea of evolution of species by natural selection was given by ……….. (Robert brost, Charles Darwin, van duke)

The reduction of weight in the beetle due to starvation is …………. trait. (in acquired, acquired, less acquired)

The existing mankind, present on the earth has originally descended from ……… (india, America, Africa)

The Dinosaurs having feathers, belong to class …………. (vertebrae, Reptilia, chordate)

The eyes of …………… are very simple and in the form of a dot. (hydra, Planaria, buds)

The presence of Y-chromosome in human being is essential for being a ………. (bemale, cannot say, male,)

The growth of a pea plant depends on the amount of specific ............... in the plant. (protein, hormones, nutrition)

Broccoli has been developed from ……….. by artificial selection. (wild cabbage, spinach, cabbage)

The classification of living organisms explain their ................ relationships. (revolutionary, evolutionary, heredity)

The geographical isolation along with the variations leads to the formation of ……… (niches, species, breed)

The variations generated during …………. become hereditary. (asexual, bisexual, sexual reproduction)