A) chromosome b) dna nucleotide c) codon d) gene place the components in order, from smallest to largest. a) a-b-d-c b) b-c-d-a c) c-d-b-a d) d-c-b-a

The correct answer is- B) B-C-D-A that is DNA nucleotide- Codon-  Gene- Chromosome.

DNA ( deoxyribonucleic acid) is considered as the genetic material of living organisms. It is made up of small units called nucleotide ( which contains deoxyribose sugar, phosphate, and nitrogenous base).  

A sequence of three nucleotide is called codon ( which codes for a particular amino acid).

Different codons are present in a gene, which is a segment of DNA coding for a particular protein.

Finally, genes are present on chromosome ( thread like structure composed of DNA).

Thus, option B) correctly depicts the given components in order, from smallest to largest.

the growth of the plants is affected by the heat of the light. what is the student doing?

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.