Mutation of which of the following would result in the least disruption during development of a frog embryo?
a. ribosomal protein gene
b. rna polymerase gene
c. homeotic gene
d. melanin gene

The correct answer is option D- Melanin gene.

All the other options such as ribosomal protein gene, RNA polymerase gene and homeotic gene plays a role in the development of frog embryo, on the contrary melanin gene does not.

Melanin gene activates cells called melanocyets which control the complexion of a skin in organisms. There are multiple colors of skin depending upon the activity of melanin gene present in the body.

the eggs of the insects should be the first thing collected at the scene.

false

c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.